Drop Down MenusCSS Drop Down MenuPure CSS Dropdown Menu

vendredi 29 juillet 2016

Experimental investigation of materials for parachutes for illuminating shells

Experimental investigation of materials for parachutes for illuminating shells McCarty, James Weldon Issued as final report

from Theses online http://www.rssmix.com/

jeudi 28 juillet 2016

In suspension: the denial of the rights of the city for Palestinians in Israel and its effects on their socio-economic, cultural and political formation: the case of Umm Al-Fahem

Massalha, Manal (2014) In suspension: the denial of the rights of the city for Palestinians in Israel and its effects on their socio-economic, cultural and political formation: the case of Umm Al-Fahem. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/2adQt7x

The boycott, divestment, and sanctions movement: activism across borders for Palestinian justice

Morrison, Suzanne (2015) The boycott, divestment, and sanctions movement: activism across borders for Palestinian justice. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/2asvScD

Putting the work-life interface into a temporal context: an empirical study of work-life balance by life stage and the consequences of homeworking

Canonico, Esther (2016) Putting the work-life interface into a temporal context: an empirical study of work-life balance by life stage and the consequences of homeworking. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/2adQvwe

Contesting identity and preventing belonging? An analysis of British counter terrorism policy since the Terrorism Act 2000 and the selective use of the terrorism label by the British Government.

Norris, Maria (2015) Contesting identity and preventing belonging? An analysis of British counter terrorism policy since the Terrorism Act 2000 and the selective use of the terrorism label by the British Government. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/2abNusz

Three aspects of mathematical models for asymmetric information in financial market

Li, Cheng (2016) Three aspects of mathematical models for asymmetric information in financial market. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/2az2DaB

A life course perspective to abortion in Finland

Väisänen, Heini (2016) A life course perspective to abortion in Finland. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/2abNIQ5

mercredi 27 juillet 2016

Field-intensity survey on 49.5 and 99 megacycles

Field-intensity survey on 49.5 and 99 megacycles Honnell, Martial Alfred Issued as final report

from Theses online http://www.rssmix.com/

lundi 25 juillet 2016

Data as Wood

Data as Wood Bennett, Charlie; Doshi, Ameet; Hagenmaier, Wendy; Rascoe, Fred Interview portion of Lost in the Stacks episode 311, broadcast July 22, 2016. Features interview with Nicholas Felton, designer of the Facebook timeline and creator of the Feltron Report. Felton discusses data visualization, information privacy, and the concept of "Data as Wood".

from Theses online http://www.rssmix.com/

jeudi 21 juillet 2016

The impact of international norms on Islamist politics: the case of Hezbollah

Dionigi, Filippo (2011) The impact of international norms on Islamist politics: the case of Hezbollah. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29VFewD

mardi 19 juillet 2016

Impact of Intrinsic and Extrinsic Motivation on Leadership Emergence in Teams

Impact of Intrinsic and Extrinsic Motivation on Leadership Emergence in Teams Nandagopal, Bharathwaj This paper explores the relationship between motivation (intrinsic & extrinsic) and leadership emergence in order to mitigate extreme (too much or too little) leadership claiming and granting. The study examines DeRue and Ashford’s (2010) research, in addition to a host of other research articles, to hypothesize that intrinsic motivation is positively correlated to leadership claiming, while extrinsic motivation is positively correlated to leadership granting. The participants of this study are college students who have registered for course based credit at a midsize southeastern university. Each participant will join a team (three individuals per team), four teams per session. The four aforementioned teams will work as part of a larger problem-solving group to plan a civil infrastructure project in a fictitious developing nation. Before and throughout the study (at various time points), surveys will be administered that will collect information on motivation and leadership measures. After conducting analysis on the data, if the results support the aforementioned hypotheses, then extreme leadership claiming and granting can be mitigated by optimizing the amount of intrinsically and extrinsically motivated individuals on the team.

from Theses online http://www.rssmix.com/

The Effect of Sweep and Taper on Static Performance for Small Propellers

The Effect of Sweep and Taper on Static Performance for Small Propellers Kadri, Tobi These past few years have been the years of the UAV. UAVs, also called drones, now have the friendly tasks of filming sports or movie scenes, civilian surveillance, and simple general aviation. Some companies see a future where UAVs are delivering pizza or packages. All of this shows a demand for civilian UAVs, typically in the form of quadcopters, but can also be small R/C planes. These aircraft are usually powered by small propellers and the design for propellers has not changed much despite the recent wave of UAV popularity. Two universities have made serious progress in the tabulation of small and micro propeller performance, but the realm of small and micro propeller geometry has not been pursued. Most propellers today are only classified by diameter and pitch, a measure of how far a propeller would “screw” into a solid object but other geometries of the propeller may lead to enhanced performance as well. In this study, seventeen 9 in. propellers were fabricated and tested. Thrust and torque coefficients were plotted against RPM since the tests were conducted statically. Forward sweep has adverse effects on both thrust and torque with only a hint that a higher sweep magnitude might yield significant performance improvements. Aft sweep yields substantial increases in thrust and torque, at the expense of higher power, and should qualify as a viable parameter for propeller manufactures to include in designs. A taper ratio greater than 1 has negligible increases in both thrust and torque while a taper ratio less than 1 has adverse effects on both. Varying taper ratio, at least solely from root to tip, is therefore not an effective strategy for thrust or torque augmentation, however small taper does reduce the induced power for a given thrust.

from Theses online http://www.rssmix.com/

Integrating Chinese Data from Sina Weibo to the LITMUS Landslide Detection System

Integrating Chinese Data from Sina Weibo to the LITMUS Landslide Detection System Xie, Jiateng The detection of landslides has been a challenging problem for researchers since there are no dedicated physical sensors to detect landslides. LITMUS is a landslide detection system based on information from both social media platforms and physical sensors. It does have its own limitations, however, because it only supports English data. We propose to integrate the Chinese data from Sina Weibo to the LITMUS landslide detection system to extend its service. The Chinese LITMUS system pipeline starts off by collecting data from Sina Weibo using a web crawler. Then, it applies a few filtering techniques to tackle part of the noise that comes with the dataset. Subsequently, the system uses a combination of Named Entity Recognition (NER)-based and gazetteer-based approach to geo-tag the data items. The data-items that contain the same location entity are grouped to one cluster, which represents a candidate event. The system then classifies each data item to identify the remaining noise by using Word2Vec and Support Vector Machine (SVM). Lastly, the system makes a decision based on the majority label assigned to each cluster by the classifier as to whether or not a candidate event is an actual landslide event. Through our experiments, we show that the classification component of the system achieves about 0.96 in precision, recall and F-measure using the evaluation dataset, and that the system is able to detect a large number of landslides in China.

from Theses online http://www.rssmix.com/

The Closed Loop Optimization of Deep Brain Stimulation Programming

The Closed Loop Optimization of Deep Brain Stimulation Programming Singh, Ravinderjit Deep brain stimulation (DBS) is a procedure used to treat movement disorders such as Parkinson's disease. The current procedure for programming the parameters for DBS is time consuming and prone to error. The DBS programming procedure can be significantly improved using a closed-loop optimization approach. Due to recent advances in quantitative assessment metrics, the capability to translate a closed-loop optimization procedure for DBS programming from simulation to clinic has become more possible. Previous literature has presented closed-loop approaches that utilize evolutionary algorithms. It is very difficult to implement an evolutionary algorithm in the clinic because they typically require a large number of parameter evaluations. A parameter evaluation is testing how well a certain set of DBS parameters work. It is difficult to do a large number of parameter evaluations due to time constraints and patient fatigue. A response surface based closed-loop optimization approach for DBS programming is presented that has higher potential to be translated to the clinic because it requires much less parameter evaluations.

from Theses online http://www.rssmix.com/

samedi 16 juillet 2016

Accès au financement par les micros, petites et moyennes entreprises à goma, de 2014 à 2016

par Wassy TSHIKAMA MUSORONGI Univesité de Goma 2014

from Memoire Online http://ift.tt/1NiT8q3

Le juge fiscal camerounais

par Janvier FERMOSE Université de Ngaoundéré 2012

from Memoire Online http://ift.tt/1NiT8q3

Mascots in Japan

par Flora Mitsushima ISCOM Paris 2015

from Memoire Online http://ift.tt/1NiT8q3

vendredi 15 juillet 2016

Three essays in financial economics

Glebkin, Sergey (2016) Three essays in financial economics. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29DC66O

To fulfil the law: evangelism, legal activism, and public Christianity in contemporary England

McIvor, Méadhbh (2016) To fulfil the law: evangelism, legal activism, and public Christianity in contemporary England. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29UrLqJ

The reel city: London, symbolic power and cinema

Masrani, Rahoul (2016) The reel city: London, symbolic power and cinema. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29DCbay

samedi 9 juillet 2016

[hal-01343348] D.1.3 – Protocols for emergent localities

This report presents two contributions that illustrate the potential of emerging-locality protocols in large-scale decentralized systems, in two areas of decentralized social computing: recommendation, and eventual consistency of mutable data structures. The first contribution consists of a framework supporting the development of dynamically adaptive decen-tralised recommendation systems. Decentralised recommenders have been proposed to deliver privacy-preserving, personalised and highly scalable on-line recommendations. Current implementations tend, however, to rely on a hard-wired similarity metric that cannot adapt. This constitutes a strong limitation in the face of evolving needs. Our framework address this through a decentralised form of adaptation, in which individual nodes can independently select, and update their own recommendation algorithm, while still collectively contributing to the overall system's mission. Our second contribution addresses the growing demand for differentiated consistency requirements in large-scale applications. A large number of today's applications rely on Eventual Consistency, a consistency model that emphasizes liveness over safety. Designers generally adopt this consistency model uniformly throughout a distributed system due to its ability to scale as the number of users or devices grows larger. But this clashes with the need for differentiated consistency requirements. In this contribution, we address this need by introducing UPS, a novel consistency mechanism that offers differentiated eventual consistency and delivery speed by working in pair with a two-phase epidemic broadcast protocol. We propose a closed-form analysis of our approach's delivery speed, and we evaluate our complete protocol experimentally on a simulated network of one million nodes. To measure the consistency trade-off, we formally define a novel and scalable consistency metric operating at runtime.

from HAL : Dernières publications http://ift.tt/29uJZRH

[hal-01316014] A Methodology for Quality Assessment in Collaborative Score Libraries

We examine quality issues raised by the development of XML-based Digital Score Libraries. Based on the authors' practical experience, the paper exposes the quality shortcomings inherent to the complexity of music encoding, and the lack of support from state-of-the-art formats. We also identify the various facets of the ``quality'' concept with respect to usages and motivations. We finally propose a general methodology to introduce quality management as a first-level concern in the management of score collections, and an initial taxonomy of quality problems based on real use cases.

from HAL : Dernières publications http://ift.tt/29w5m0H

[hal-01343121] Impact de la recherche d'amorces mutées sur les résultats d'analyses métagénomiques

En métagénomique ciblée, une problématique récurrente concerne la quantité de lectures réellement exploitables en sortie d'un séquenceur à haut débit. L'une des étapes influençant cette quantité est la détection dans chaque séquence des amorces utilisées pour amplifier le gène ciblé. Usuellement les séquences n’ayant pas les amorces parfaites sont rejetées. Notre étude interroge l’impact d’accepter également les séquences avec amorces mutées. Il s’agit de répondre aux questions suivantes : Accepter les séquences avec amorces mutées permet-il d'augmenter le nombre de séquences exploitables par échantillon ? Cette augmentation impacte-t-elle les résultats obtenus au terme de l'analyse métagénomique , c’est-à-dire permet-elle d’augmenter le nombre d’OTU (Operationnal taxonomic unit), et donc potentiellement d’espèces, détectés ? L’étude a été menée sur 9 échantillons, dans le cadre d’une étude de la biodiversité des sols tropicaux chez les eucaryotes unicellulaires. Les échantillons ont été séquencés à la fois en Roche/454 et en Illumina MiSeq, afin de pouvoir constater l'impact de la technologie sur les résultats. Le séquençage a ciblé la région V4 de la sous-unité 18S de l'ARN ribosomique. En résultat, on observe que la recherche des amorces V4F et V4R mutées permet d'améliorer de façon non-négligeable la sensibilité de l’analyse métagénomique. Cela augmente le rappel parmi les séquences d'un échantillon et cela permet également la détection de nouveaux OTU (+7 à +10 %, dans notre étude, en fonction de la technologie de séquençage), que ce soit en augmentant l'abondance de séquences détectées en nombre insuffisant pour être validées ou que ce soit en détectant des séquences totalement nouvelles qui n'étaient pas visibles auparavant. Une étude supplémentaire a par ailleurs montré que ces nouveaux OTU, et notamment les totalement nouveaux, étaient aussi crédibles que les OTU avec amorces exactes.

from HAL : Dernières publications http://ift.tt/29uJUx8

[hal-01313749] Temperature dependence of the particle/gas partition coefficient: An application to predict indoor gas-phase concentrations of semi-volatile organic compounds

The indoor gas-phase concentrations of semi-volatile organic compounds (SVOCs) can be predicted from their respective concentrations in airborne particles by applying the particle/gas partitioning equilibrium. The temperature used for partitioning is often set to 25 °C. However, indoor temperatures frequently differ from this reference value. This assumption may result in errors in the predicted equilibrium gas-phase SVOC concentrations. To improve the prediction model, the temperature dependence of the particle/gas partition coefficient must be addressed. In this paper, a theoretical relationship between the particle/gas partition coefficient and temperature was developed based on the SVOC absorptive mechanism. The SVOC particle/gas partition coefficients predicted by employing the derived theoretical relationship agree well with the experimental data retrieved from the literature (R > 0.93). The influence of temperature on the equilibrium gas-phase SVOC concentration was quantified by a dimensionless analysis of the derived relationship between the SVOC particle/gas partition coefficient and temperature. The predicted equilibrium gas-phase SVOC concentration decreased by between 31% and 53% when the temperature was lowered by 6 °C, while it increased by up to 750% when the indoor temperature increased from 15 °C to 30 °C

from HAL : Dernières publications http://ift.tt/29w5ptE

[hal-01308004] Impact of the French 3rd and 4th generation pill scare in women seeking termination of pregnancy

Introduction The aim of this study was to evaluate changes in the contraceptive profile of women seeking termination of pregnancy following the debate on 3rd and 4th generation pills in France in 2012. Materials and methods Single-center case-control study comparing the attitude to contraception before (between 02/15/2012 and 07/16/2012) and after the debate (between 02/25/2013 and 06/24/2013). Results A total of 291 patients consulted before and 601 after the debate. We showed that there were more students (+9.5%), more single women (+8.3%) and fewer working women (–7.7%) in the cohort after the debate. After the termination procedure, prescriptions for long-acting reversible contraceptive (LARC) methods increased (+7.8%, P = 0.03), in particular in patients aged 25 or younger, including nulliparous (+12.6%, P = 0.02). Conclusion The media alert about the pill led to a change in the contraceptive standard in the post-abortion period and altered patient profiles. An increase was notably observed in certain vulnerable populations (high school students, unemployed and single women). It remains to be seen whether these changes are transient or permanent

from HAL : Dernières publications http://ift.tt/29uJXZY

[hal-01290932] An Extension of SPARQL with Fuzzy Navigational Capabilities for Querying Fuzzy RDF Data

The Resource Description Framework (RDF) is the graph-based standard data model for representing semantic web information, and SPARQL is the standard query language for querying RDF data. Because of the huge volume of linked open data published on the web, these standards have aroused a large interest in the last years. This paper proposes a fuzzy extension of the SPARQL language that improves its expressiveness and usability. This extension allows (1) to query a fuzzy RDF data model, and (2) to express fuzzy preferences on data and on the structure of the data graph, which has not been proposed in any previous fuzzy extensions of SPARQL.

from HAL : Dernières publications http://ift.tt/29w5vRX

[hal-01343753] Frederic Lee and post-Keynesian pricing theory

Frederic Lee has been a major contributor to post-Keynesian economics, mainly to its theory of pricing. This article summarizes his objections to the neoclassical view of the firm and pricing, as well as his view that changes in quantities, rather than in prices, provide the important information to firms. It also outlines Lee's views on competition, and examines the three pricing doctrines Lee carefully analyzed—markup pricing (associated with Kalecki), normal-cost pricing or full-cost pricing (associated with Andrews), and target-return or administered pricing (associated with Means). The article then discusses the relationship between Lee and three strands of post-Keynesianism: Kaleckian, Sraffian and Eichnerian pricing theories. It explains why Lee objected to some features of each of these. The article concludes by discussing why, towards the end of his life, Lee felt (mistakenly) that his ideas had been dismissed by heterodox economists.

from HAL : Dernières publications http://ift.tt/29uKAm9

[hal-01343731] Ecological monetary economics: a post-Keynesian critique

The monetary analysis of some ecological economists currently appears to be mostly articulated around the following core: a stationary economy (and a fortiori a degrowth economy) is incompatible with a system in which money is created as interest-bearing debt. To question the relevance of the debt-money/positive interest rate/output growth nexus, this paper adopts a critical stance towards the currently emerging ecological monetary economics from the standpoint of another strand of heterodox economics – the post-Keynesian approach. In its current state, ecological monetary economics is at odds with post-Keynesian economics in its analysis of the money–growth relationship. This will be shown using the theory of endogenous money and a simple Cambridgian–Kaleckian model where debt-money and a positive interest rate are compatible with a full stationary economy.

from HAL : Dernières publications http://ift.tt/29w5qxl

[hal-01343736] Teaching monetary theory and monetary policy implementation after the crisis

The author reflects on the state of macroeconomic theory, and more specifically on how monetary economics is being taught in the aftermath of the global financial crisis. Whereas heterodox macroeconomic theory is very much alive due to the influx of a large number of contributions and contributors, the latter still have a hard time finding positions in the academic world, as journal and departmental ranking exercises have restricted so-called standards of excellence to the neoclassical approach. The crisis has not yet induced mainstream economists to open up to different approaches that put more emphasis on realistic features than on imaginary ones based on neoclassical micro-foundations. As an exemplar, the chapters on money and banking in two first-year textbooks are being examined, an orthodox one by Greg Mankiw and a heterodox one by Neva Goodwin et al. Unsurprisingly there is little to be learned about the crisis from Mankiw's book, while the book by Goodwin et al. devotes a large amount of space to the causes and consequences of the crisis. Still, Goodwin and her co-authors are not heterodox enough: they are less heterodox than a number of central bankers when it comes to a number of key features of monetary theory.

from HAL : Dernières publications http://ift.tt/29uJVRM

[hal-01343732] Convergence towards the normal rate of capacity utilization in neo-Kaleckian models: the role of non-capacity creating autonomous expenditures

Neo-Kaleckian models of growth and distribution have been highly popular among heterodox economists. Two drawbacks of these models have, however, been underlined in the literature: first, the models do not usually converge to their normal rate of capacity utilization; second, the models do not include the Harrodian principle of dynamic instability. Some Sraffian economists have long been arguing that the presence of non-capacity creating autonomous expenditures provides a mechanism that brings back the model to normal rates of capacity utilization, while safeguarding the main Keynesian message and without going back to classical conclusions. The present article provides a very simple proof of this, showing within a neo-Kaleckian model that the Harrodian principle of dynamic instability gets tamed by the presence of autonomous consumer expenditures.

from HAL : Dernières publications http://ift.tt/29w5e1r

[hal-01343730] Peut-on expliquer le faible taux d'emploi des seniors en France ?

[...]

from HAL : Dernières publications http://ift.tt/29uKjQn

[hal-01343728] Faut-il reculer l'âge légal du départ à la retraite ?

[...]

from HAL : Dernières publications http://ift.tt/29w5u0l

[hal-01343744] The monetary and fiscal nexus of neo-chartalism: A friendly critique

A number of post-Keynesian authors, called the neo-chartalists, have argued that the government does not face a budget constraint similar to that of households and that government with sovereign currencies run no risk of default, even with high debt-to-GDP ratio. This stands in contrast to countries in the eurozone, where the central bank does not normally purchase sovereign debt. While these claims now seem to be accepted by some economists, neo-chartalists have also made a number of controversial claims, including that the government spends simply by crediting a private-sector-bank account at the central bank; that the government does need to borrow to deficit-spend; and that taxes do not finance government expenditures. This paper shows that these surprising statements do have some logic, once one assumes the consolidation of the government sector and the central bank into a unique entity, the state. The paper further argues, however, that these paradoxical claims end up being counter-productive since consolidation is counter-factual.

from HAL : Dernières publications http://ift.tt/29uKfQv

[hal-01343745] Crise financière, répartition des revenus et relance par les salaires

Tandis que la plupart des économistes attribuent la crise financière de 2007-2008 aux incohérences des marchés financiers, un certain nombre d’économistes, surtout hétérodoxes, associent cette crise à des éléments structurels, notamment la croissance des inégalités, mesurée par la progression de la part des profits dans le revenu national et par la dispersion des salaires. L’auteur présente les résultats d’un projet de recherche dont les différents modules ont analysé les causes de ces évolutions ainsi que les conséquences négatives de la baisse de la part des salaires pour la croissance de la demande et la croissance de la productivité. Les politiques néolibérales ont donc eu des effets néfastes pour l’économie, effets qui n’ont pu être compensés que temporairement par des artifices comme l’endettement accru des ménages et les politiques de croissance par les exportations. Il importe donc de faire marche arrière, et de revenir à des politiques favorisant le plein emploi et la relance par les salaires.

from HAL : Dernières publications http://ift.tt/29w5tJP

[hal-01343735] Understanding of the Global Financial Crisis: Contributions of post-Keynesian economics

Post-Keynesian economics has greatly improved our understanding of the causes as well as some of the consequences of the Global Financial Crisis. This paper deals with some examples related to monetary issues—namely, the financial instability hypothesis of Minsky and its extension to the household sector, as well as the post-Keynesian theory of endogenous money, with its extension to quantitative easing policies set within a framework where the central bank’s target rate of interest is set equal to the rate of interest paid on reserves.

from HAL : Dernières publications http://ift.tt/29uKgUv

[hal-01343734] Linear and nonlinear Granger causality between short-term and long-term interest rates during business cycles

This paper is about the causal relationship between short-term and long-term interest rates in the U.S. and Canada. To that end, we apply a linear Granger causality test introduced by Toda-Yamamoto (1995) and the nonlinear Granger causality test of Diks and Panchenko (2006). By combining linear causality effects with the nonlinear ones, it is seen that the most common Granger causality direction between short-term and long-term interest rates is a bidirectional one. We also find that nonlinear Granger causality can be found where no linear causality had been uncovered. Moreover, our findings show that during recent business cycles, the federal funds rate (in the U.S.) and the overnight rate (in Canada) still Granger-cause long-term interest rates significantly.

from HAL : Dernières publications http://ift.tt/29w5lKb

[hal-01343733] A two-sector model with target-return pricing in a stock-flow consistent framework

In this paper, we build a generalized Kaleckian two-sector model in a closed economy and explore the dynamics towards long-run positions. The model incorporates conflicting claims of labour and firms over income distribution and endogenous labour-saving technical progress. Adopting a stock-flow consistent framework, our simulation experiments yield the following results. First, the ‘paradox of thrift’ and the ‘paradox of costs’ hold, but the magnitude of the impact depends on the initial status of income distribution and monetary policy. Second, changes in autonomous labour-saving innovation might explain the phenomenon of the “new economy” of the second half of the 1990s within an alternative framework. Our model reinforces a post-Keynesian growth theory where aggregate demand is the crucial determinant of long-run positions as well as short-run positions, and shows that economic growth is demand-led and characterized by ‘path-dependency’.

from HAL : Dernières publications http://ift.tt/29uK87J

[hal-01343742] The Eurozone crisis: a balance-of-payment problem or a crisis due to a flawed monetary design?

Both Sergio Cesaratto and I see several flaws in the setup of the common currency Eurozone, and we both understand, in a similar way, the functioning of a monetary economy. The only point of disagreement it seems to me is that Cesaratto insists that the Eurozone crisis is a balance-of-payments problem, tied to current account deficits and capital outflows. But whereas the continuous loss of foreign reserves must eventually lead to some painful adjustment, Eurozone countries can never run out of TARGET2 balances, which can take unlimited negative values, so that the evolution of the balance of payments cannot be the source of the crisis. My view, and Roberto Frenkel’s, is that investors perceived, in contrast to other central banks, that the European Central Bank by convention and by design would decline to act as the purchaser of last resort until it became too late, which explains the speculative attacks against the securities issued by the governments of the Eurozone periphery.

from HAL : Dernières publications http://ift.tt/29w5vRR

[hal-01343743] A comment on Endogenous money and effective demand: a revolution or a step backward?

Steve Keen argues that post-Keynesians have not sufficiently emphasized the revolutionary character of endogenous money for macroeconomic theory, and that this should be done by recognizing that aggregate demand is equal to current or past income plus the change in debt. This equation, attributed in particular to Hyman Minsky, is discussed and questioned, and it is recalled that a similar equation had been proposed by Alfred Eichner. The consequences of bank credit for firms or households are further analysed within the context of the national accounts, and it is shown that one does not need a redefinition of aggregate demand and aggregate supply, in contrast to what is proposed by Keen.

from HAL : Dernières publications http://ift.tt/29uJKpH

[hal-01305478] Prenatal stress and early-life exposure to fluoxetine have enduring effects on anxiety and hippocampal BDNF gene expression in adult male offspring

With the growing use of selective serotonin reuptake inhibitor medications (SSRIs) for the treatment of depression during the perinatal period, questions have been raised about the longterm impact of these medications on development. We aimed to investigate how developmental SSRI exposure may alter affect-related behaviors and associated molecular processes in offspring using a rodent model of maternal stress and depression. For this purpose, prenatally stressed or non-stressed male offspring were exposed to fluoxetine (5 mg/kg/day) or vehicle, via lactation, until weaning. Primary results show that postnatal fluoxetine exposure differentially altered anxiety-like behavior by increasing anxiety in non-stressed offspring and decreasing anxiety in prenatally stressed offspring. In the hippocampus, developmental fluoxetine exposure decreased BDNF IV and TrkB mRNA expression. Prenatal stress alone also decreased escape behaviors and decreased hippocampal BDNF IV mRNA expression. These data provide important evidence for the long-term programming effects of early-life exposure to SSRIs on brain and behavior.

from HAL : Dernières publications http://ift.tt/29w5M7a

[hal-01341197] Hole propagation in the Kitaev-Heisenberg model: From quasiparticles in quantum Néel states to non-Fermi liquid in the Kitaev phase

[...]

from HAL : Dernières publications http://ift.tt/29uKhb5

[hal-01319873] Zwitterionic [4]helicene: a water-soluble and reversible pH-triggered ECD/CPL chiroptical switch in the UV and red spectral regions

The chiroptical switching properties of a readily accessible and water-soluble diaza [4]helicene are disclosed. This zwitterionic dye displays pH-dependent absorption and emission properties and this enables a reversible turn on/off of electronic circular dichroism at 300 nm and of circularly polarized luminescence in the red region upon protonation/deprotonation

from HAL : Dernières publications http://ift.tt/29w5nSy

[hal-01343314] Bounded combinatorics and uniform models for hyperbolic 3-manifolds

Bounded-type 3-manifolds arise as combinatorially bounded gluings of irreducible 3-manifolds chosen from a finite list. We prove effective hyperbolization and effective rigidity for a broad class of 3-manifolds of bounded type and large gluing heights. Specifically, we show the existence and uniqueness of hyperbolic metrics on 3-manifolds of bounded type and large heights, and prove existence of a bilipschitz diffeomorphism to a combinatorial model described explicitly in terms of the list of irreducible manifolds, the topology of the identification, and the combinatorics of the gluing maps.

from HAL : Dernières publications http://ift.tt/29uK5Zf

[hal-01059991] On a Fuzzy Algebra for Querying Graph Databases

This paper proposes a notion of fuzzy graph database and describes a fuzzy query algebra that makes it possible to handle such database, which may be fuzzy or not, in a flexible way. The algebra, based on fuzzy set theory and the concept of a fuzzy graph, is composed of a set of operators that can be used to express preference queries on fuzzy graph databases. The preferences concern i) the content of the vertices of the graph and ii) the structure of the graph. In a similar way as relational algebra constitutes the basis of SQL, the fuzzy algebra proposed here underlies a user-oriented query language and an associated tool implementing this language that are also presented in the paper.

from HAL : Dernières publications http://ift.tt/1AANPMA

[hal-01093013] Evaluation and Improvement of a Transition Business Process: A Case Study guided by a Semantic Quality-based Approach

A transition in an outsourced IT project is devoted to the transfer of the project from an outgoing project team to an incoming one. It is a complex, risky and challenging building block of importance, identified as being a critical factor in the success of an outsourced project. Ensuring the good quality of a transition is then fundamental. We present here our experience on quality evaluation and improvement of a real transition in a public institution.

from HAL : Dernières publications http://ift.tt/12p9kTn

[hal-01140195] Expression and Efficient Processing of Fuzzy Queries in a Graph Database Context

Graph databases have aroused a large interest in the last years thanks to their large scope of potential applications (e.g. social networks, biomedical networks, data stemming from the web). In a similar way as what has already been proposed in relational databases, defining a language allowing a flexible querying of graph databases may greatly improve usability of data. This paper focuses on the notion of fuzzy graph database and describes a fuzzy query language that makes it possible to handle such database, which may be fuzzy or not, in a flexible way. This language, called FUDGE, can be used to express preference queries on fuzzy graph databases. The preferences concern i) the content of the vertices of the graph and ii) the structure of the graph. The FUDGE language is implemented in a system, called SUGAR, that we present in this article. We also discuss implementation issues of the FUDGE language in SUGAR.

from HAL : Dernières publications http://ift.tt/1ajREfW

[hal-01341574] Optical properties of Ag- and AgI-doped Ge-Ga-Te far-infrared chalcogenide glasses

Te-based glasses are ideal material for life detection and infrared-sensing applications because of their excellent far-infrared properties. In this study, the influence of Ag- and AgI- doped Te-based glasses were discussed. Thermal and optical properties of the prepared glasses were evaluated using X-ray diffraction, differential scanning calorimetry, and Fourier transform infrared spectroscopy. Results show that these glass samples have good amorphous state and thermal stability. However, Ge-Ga-Te-Ag and Ge-Ga-Te-AgI glass systems exhibit completely different in optical properties. With an increase of Ag content, the absorption cut-off edge of Ge-Ga-Te-Ag glass system has a red shift. On the contrary, a blue shift appears in Ge-Ga-Te-AgI glass system with an increase of AgI content. Moreover, the transmittance of Ge-Ga-Te-Ag glass system deteriorates while that of Ge-Ga-Te-AgI glass system ameliorates. All glass samples have wide infrared transmission windows and the far-infrared cut-off wavelengths of these glasses are beyond 25 μm. The main absorption peaks of these glasses are eliminated through a purifying method. © 2016 Elsevier B.V.

from HAL : Dernières publications http://ift.tt/29uKnj1

[hal-01313738] Selecting cost effective and policy-relevant biological indicators for European monitoring of soil biodiversity and ecosystem function

Soils provide many ecosystem services that are ultimately dependent on the local diversity and belowground abundance of organisms. Soil biodiversity is affected negatively by many threats and there is a perceived policy requirement for the effective biological monitoring of soils at the European level. The aim of this study was to evaluate and recommend policy relevant, cost-effective soil biological indicators for biodiversity and ecosystem function across Europe. A total of 18 potential indicators were selected using a logical-sieve based approach. This paper considers the use of indicators from the ‘top down’ (i.e. concerned with the process of indicator selection), rather than from the ‘bottom up’ detail of how individual indicators perform at specific sites and with specific treatments. The indicators assessed a range of microbial, faunal and functional attributes, newer nucleic acids based techniques, morphological approaches and process based measurements. They were tested at 6 European experimental sites already in operation and chosen according to land-use, climatic zone and differences in land management intensity. These were 4 arable sites, one each in Atlantic, Continental, Mediterranean and Pannonian climate zones, and 2 grassland sites, one each in Atlantic and Continental zones. At each site we sampled three replicated plots of contrasting management intensity and, while the treatments varied from site to site, their disturbance effects were quantified in terms of land use intensity. The field sampling and laboratory analysis were standardised through a combination of ISO protocols, or standard operating procedures if the former were not available. Sites were sampled twice, in autumn 2012 and spring or autumn 2013, with relative costs of the different indicators being determined each time. A breakdown of the cost effectiveness of the indicators showed the expected trade-off between effort required in the field and effort required in the laboratory. All the indicators were able to differentiate between the sites but, as no single indicator was sensitive to all the differences in land use intensity, we suggest that an indicator programme should be based upon a suite of different indicators. For monitoring under the European climatic zones and land uses of this study, indicators for ecosystem functions related to the services of water regulation, C-sequestration and nutrient provision would include a minimum suite of: earthworms; functional genes; and bait lamina. For effective monitoring of biodiversity all taxonomic groups would need to be addressed

from HAL : Dernières publications http://ift.tt/29w5nSj

[hal-01342351] Traceability analyses between features and assets in software product lines

In a Software Product Line (SPL), the central notion of implementability provides the requisite connection between specifications and their implementations, leading to the definition of products. While it appears to be a simple extension of the traceability relation between components and features, it involves several subtle issues that were overlooked in the existing literature. In this paper, we have introduced a precise and formal definition of implementability over a fairly expressive traceability relation. The consequent definition of products in the given SPL naturally entails a set of useful analysis problems that are either refinements of known problems or are completely novel. We also propose a new approach to solve these analysis problems by encoding them as Quantified Boolean Formulae (QBF) and solving them through Quantified Satisfiability (QSAT) solvers. QBF can represent more complex analysis operations, which cannot be represented by using propositional formulae. The methodology scales much better than the SAT-based solutions hinted in the literature and were demonstrated through a tool called SPLAnE (SPL Analysis Engine) on a large set of SPL models.

from HAL : Dernières publications http://ift.tt/29uK0Vp

[hal-01342826] Survey of radio resource management issues and proposals for energy-efficient cellular networks that will cover billions of machines

A huge increase of machines attached to wireless networks is expected in the next few years. A large part of these machines will be covered by some wireless wide area networks. The arrival of cellular M2M (machine-to-machine) communication poses new requirements due to its specific characteristics. For most of the cellular M2M applications, the essential requirement is low energy consumption level or high energy efficiency. This survey provides a global view of the network technologies previewed for cellular M2M. In this survey, we study the existing classifications of M2M applications according to different criteria in the literature. The comparison of traffic characteristics between M2M and human-to-human is also proposed. Quality of service (QoS) requirements for typical M2M applications are resumed. The advance of reference M2M network architectures proposed by the Standard Development Organization (SDO) is investigated. We identify two possible effort directions to improve the energy efficiency for cellular M2M. The first one is to evolve the current existing 3rd Generation Partnership Project (3GPP) Consortium cellular networks to effectively support MTC (Machine Type Communication). The other direction is to design M2M-dedicated networks from scratch, which are often called low-power wide-area (LPWA) networks. We review, compare and categorize the proposals related to energy issues of cellular M2M mainly over the period 2011-2015 for the first direction. We introduce the development of LPWA networks for the other research directions. We highlight that the cooperative relaying, the design of energy-efficient signaling and operation, the new radio resource allocation schemes, and the energy-efficient random access procedure are the main points of improvement. It is important to jointly use the aforementioned approaches, for example, joint design of random access control and radio resource allocation, to seek for a trade-off between energy efficiency and other system performances.

from HAL : Dernières publications http://ift.tt/29w5sW2

[hal-01343348] D.1.3 – Protocols for emergent localities

This report presents two contributions that illustrate the potential of emerging-locality protocols in large-scale decentralized systems, in two areas of decentralized social computing: recommendation, and eventual consistency of mutable data structures. The first contribution consists of a framework supporting the development of dynamically adaptive decen-tralised recommendation systems. Decentralised recommenders have been proposed to deliver privacy-preserving, personalised and highly scalable on-line recommendations. Current implementations tend, however, to rely on a hard-wired similarity metric that cannot adapt. This constitutes a strong limitation in the face of evolving needs. Our framework address this through a decentralised form of adaptation, in which individual nodes can independently select, and update their own recommendation algorithm, while still collectively contributing to the overall system's mission. Our second contribution addresses the growing demand for differentiated consistency requirements in large-scale applications. A large number of today's applications rely on Eventual Consistency, a consistency model that emphasizes liveness over safety. Designers generally adopt this consistency model uniformly throughout a distributed system due to its ability to scale as the number of users or devices grows larger. But this clashes with the need for differentiated consistency requirements. In this contribution, we address this need by introducing UPS, a novel consistency mechanism that offers differentiated eventual consistency and delivery speed by working in pair with a two-phase epidemic broadcast protocol. We propose a closed-form analysis of our approach's delivery speed, and we evaluate our complete protocol experimentally on a simulated network of one million nodes. To measure the consistency trade-off, we formally define a novel and scalable consistency metric operating at runtime.

from HAL : Dernières publications http://ift.tt/29uJZRH

[hal-01316014] A Methodology for Quality Assessment in Collaborative Score Libraries

We examine quality issues raised by the development of XML-based Digital Score Libraries. Based on the authors' practical experience, the paper exposes the quality shortcomings inherent to the complexity of music encoding, and the lack of support from state-of-the-art formats. We also identify the various facets of the ``quality'' concept with respect to usages and motivations. We finally propose a general methodology to introduce quality management as a first-level concern in the management of score collections, and an initial taxonomy of quality problems based on real use cases.

from HAL : Dernières publications http://ift.tt/29w5m0H

[hal-01343121] Impact de la recherche d'amorces mutées sur les résultats d'analyses métagénomiques

En métagénomique ciblée, une problématique récurrente concerne la quantité de lectures réellement exploitables en sortie d'un séquenceur à haut débit. L'une des étapes influençant cette quantité est la détection dans chaque séquence des amorces utilisées pour amplifier le gène ciblé. Usuellement les séquences n’ayant pas les amorces parfaites sont rejetées. Notre étude interroge l’impact d’accepter également les séquences avec amorces mutées. Il s’agit de répondre aux questions suivantes : Accepter les séquences avec amorces mutées permet-il d'augmenter le nombre de séquences exploitables par échantillon ? Cette augmentation impacte-t-elle les résultats obtenus au terme de l'analyse métagénomique , c’est-à-dire permet-elle d’augmenter le nombre d’OTU (Operationnal taxonomic unit), et donc potentiellement d’espèces, détectés ? L’étude a été menée sur 9 échantillons, dans le cadre d’une étude de la biodiversité des sols tropicaux chez les eucaryotes unicellulaires. Les échantillons ont été séquencés à la fois en Roche/454 et en Illumina MiSeq, afin de pouvoir constater l'impact de la technologie sur les résultats. Le séquençage a ciblé la région V4 de la sous-unité 18S de l'ARN ribosomique. En résultat, on observe que la recherche des amorces V4F et V4R mutées permet d'améliorer de façon non-négligeable la sensibilité de l’analyse métagénomique. Cela augmente le rappel parmi les séquences d'un échantillon et cela permet également la détection de nouveaux OTU (+7 à +10 %, dans notre étude, en fonction de la technologie de séquençage), que ce soit en augmentant l'abondance de séquences détectées en nombre insuffisant pour être validées ou que ce soit en détectant des séquences totalement nouvelles qui n'étaient pas visibles auparavant. Une étude supplémentaire a par ailleurs montré que ces nouveaux OTU, et notamment les totalement nouveaux, étaient aussi crédibles que les OTU avec amorces exactes.

from HAL : Dernières publications http://ift.tt/29uJUx8

[hal-01313749] Temperature dependence of the particle/gas partition coefficient: An application to predict indoor gas-phase concentrations of semi-volatile organic compounds

The indoor gas-phase concentrations of semi-volatile organic compounds (SVOCs) can be predicted from their respective concentrations in airborne particles by applying the particle/gas partitioning equilibrium. The temperature used for partitioning is often set to 25 °C. However, indoor temperatures frequently differ from this reference value. This assumption may result in errors in the predicted equilibrium gas-phase SVOC concentrations. To improve the prediction model, the temperature dependence of the particle/gas partition coefficient must be addressed. In this paper, a theoretical relationship between the particle/gas partition coefficient and temperature was developed based on the SVOC absorptive mechanism. The SVOC particle/gas partition coefficients predicted by employing the derived theoretical relationship agree well with the experimental data retrieved from the literature (R > 0.93). The influence of temperature on the equilibrium gas-phase SVOC concentration was quantified by a dimensionless analysis of the derived relationship between the SVOC particle/gas partition coefficient and temperature. The predicted equilibrium gas-phase SVOC concentration decreased by between 31% and 53% when the temperature was lowered by 6 °C, while it increased by up to 750% when the indoor temperature increased from 15 °C to 30 °C

from HAL : Dernières publications http://ift.tt/29w5ptE

[hal-01308004] Impact of the French 3rd and 4th generation pill scare in women seeking termination of pregnancy

Introduction The aim of this study was to evaluate changes in the contraceptive profile of women seeking termination of pregnancy following the debate on 3rd and 4th generation pills in France in 2012. Materials and methods Single-center case-control study comparing the attitude to contraception before (between 02/15/2012 and 07/16/2012) and after the debate (between 02/25/2013 and 06/24/2013). Results A total of 291 patients consulted before and 601 after the debate. We showed that there were more students (+9.5%), more single women (+8.3%) and fewer working women (–7.7%) in the cohort after the debate. After the termination procedure, prescriptions for long-acting reversible contraceptive (LARC) methods increased (+7.8%, P = 0.03), in particular in patients aged 25 or younger, including nulliparous (+12.6%, P = 0.02). Conclusion The media alert about the pill led to a change in the contraceptive standard in the post-abortion period and altered patient profiles. An increase was notably observed in certain vulnerable populations (high school students, unemployed and single women). It remains to be seen whether these changes are transient or permanent

from HAL : Dernières publications http://ift.tt/29uJXZY

[hal-01290932] An Extension of SPARQL with Fuzzy Navigational Capabilities for Querying Fuzzy RDF Data

The Resource Description Framework (RDF) is the graph-based standard data model for representing semantic web information, and SPARQL is the standard query language for querying RDF data. Because of the huge volume of linked open data published on the web, these standards have aroused a large interest in the last years. This paper proposes a fuzzy extension of the SPARQL language that improves its expressiveness and usability. This extension allows (1) to query a fuzzy RDF data model, and (2) to express fuzzy preferences on data and on the structure of the data graph, which has not been proposed in any previous fuzzy extensions of SPARQL.

from HAL : Dernières publications http://ift.tt/29w5vRX

[hal-01343753] Frederic Lee and post-Keynesian pricing theory

Frederic Lee has been a major contributor to post-Keynesian economics, mainly to its theory of pricing. This article summarizes his objections to the neoclassical view of the firm and pricing, as well as his view that changes in quantities, rather than in prices, provide the important information to firms. It also outlines Lee's views on competition, and examines the three pricing doctrines Lee carefully analyzed—markup pricing (associated with Kalecki), normal-cost pricing or full-cost pricing (associated with Andrews), and target-return or administered pricing (associated with Means). The article then discusses the relationship between Lee and three strands of post-Keynesianism: Kaleckian, Sraffian and Eichnerian pricing theories. It explains why Lee objected to some features of each of these. The article concludes by discussing why, towards the end of his life, Lee felt (mistakenly) that his ideas had been dismissed by heterodox economists.

from HAL : Dernières publications http://ift.tt/29uKAm9

[hal-01343731] Ecological monetary economics: a post-Keynesian critique

The monetary analysis of some ecological economists currently appears to be mostly articulated around the following core: a stationary economy (and a fortiori a degrowth economy) is incompatible with a system in which money is created as interest-bearing debt. To question the relevance of the debt-money/positive interest rate/output growth nexus, this paper adopts a critical stance towards the currently emerging ecological monetary economics from the standpoint of another strand of heterodox economics – the post-Keynesian approach. In its current state, ecological monetary economics is at odds with post-Keynesian economics in its analysis of the money–growth relationship. This will be shown using the theory of endogenous money and a simple Cambridgian–Kaleckian model where debt-money and a positive interest rate are compatible with a full stationary economy.

from HAL : Dernières publications http://ift.tt/29w5qxl

[hal-01343736] Teaching monetary theory and monetary policy implementation after the crisis

The author reflects on the state of macroeconomic theory, and more specifically on how monetary economics is being taught in the aftermath of the global financial crisis. Whereas heterodox macroeconomic theory is very much alive due to the influx of a large number of contributions and contributors, the latter still have a hard time finding positions in the academic world, as journal and departmental ranking exercises have restricted so-called standards of excellence to the neoclassical approach. The crisis has not yet induced mainstream economists to open up to different approaches that put more emphasis on realistic features than on imaginary ones based on neoclassical micro-foundations. As an exemplar, the chapters on money and banking in two first-year textbooks are being examined, an orthodox one by Greg Mankiw and a heterodox one by Neva Goodwin et al. Unsurprisingly there is little to be learned about the crisis from Mankiw's book, while the book by Goodwin et al. devotes a large amount of space to the causes and consequences of the crisis. Still, Goodwin and her co-authors are not heterodox enough: they are less heterodox than a number of central bankers when it comes to a number of key features of monetary theory.

from HAL : Dernières publications http://ift.tt/29uJVRM

[hal-01343732] Convergence towards the normal rate of capacity utilization in neo-Kaleckian models: the role of non-capacity creating autonomous expenditures

Neo-Kaleckian models of growth and distribution have been highly popular among heterodox economists. Two drawbacks of these models have, however, been underlined in the literature: first, the models do not usually converge to their normal rate of capacity utilization; second, the models do not include the Harrodian principle of dynamic instability. Some Sraffian economists have long been arguing that the presence of non-capacity creating autonomous expenditures provides a mechanism that brings back the model to normal rates of capacity utilization, while safeguarding the main Keynesian message and without going back to classical conclusions. The present article provides a very simple proof of this, showing within a neo-Kaleckian model that the Harrodian principle of dynamic instability gets tamed by the presence of autonomous consumer expenditures.

from HAL : Dernières publications http://ift.tt/29w5e1r

[hal-01343730] Peut-on expliquer le faible taux d'emploi des seniors en France ?

[...]

from HAL : Dernières publications http://ift.tt/29uKjQn

[hal-01343728] Faut-il reculer l'âge légal du départ à la retraite ?

[...]

from HAL : Dernières publications http://ift.tt/29w5u0l

[hal-01343744] The monetary and fiscal nexus of neo-chartalism: A friendly critique

A number of post-Keynesian authors, called the neo-chartalists, have argued that the government does not face a budget constraint similar to that of households and that government with sovereign currencies run no risk of default, even with high debt-to-GDP ratio. This stands in contrast to countries in the eurozone, where the central bank does not normally purchase sovereign debt. While these claims now seem to be accepted by some economists, neo-chartalists have also made a number of controversial claims, including that the government spends simply by crediting a private-sector-bank account at the central bank; that the government does need to borrow to deficit-spend; and that taxes do not finance government expenditures. This paper shows that these surprising statements do have some logic, once one assumes the consolidation of the government sector and the central bank into a unique entity, the state. The paper further argues, however, that these paradoxical claims end up being counter-productive since consolidation is counter-factual.

from HAL : Dernières publications http://ift.tt/29uKfQv

[hal-01343745] Crise financière, répartition des revenus et relance par les salaires

Tandis que la plupart des économistes attribuent la crise financière de 2007-2008 aux incohérences des marchés financiers, un certain nombre d’économistes, surtout hétérodoxes, associent cette crise à des éléments structurels, notamment la croissance des inégalités, mesurée par la progression de la part des profits dans le revenu national et par la dispersion des salaires. L’auteur présente les résultats d’un projet de recherche dont les différents modules ont analysé les causes de ces évolutions ainsi que les conséquences négatives de la baisse de la part des salaires pour la croissance de la demande et la croissance de la productivité. Les politiques néolibérales ont donc eu des effets néfastes pour l’économie, effets qui n’ont pu être compensés que temporairement par des artifices comme l’endettement accru des ménages et les politiques de croissance par les exportations. Il importe donc de faire marche arrière, et de revenir à des politiques favorisant le plein emploi et la relance par les salaires.

from HAL : Dernières publications http://ift.tt/29w5tJP

[hal-01343735] Understanding of the Global Financial Crisis: Contributions of post-Keynesian economics

Post-Keynesian economics has greatly improved our understanding of the causes as well as some of the consequences of the Global Financial Crisis. This paper deals with some examples related to monetary issues—namely, the financial instability hypothesis of Minsky and its extension to the household sector, as well as the post-Keynesian theory of endogenous money, with its extension to quantitative easing policies set within a framework where the central bank’s target rate of interest is set equal to the rate of interest paid on reserves.

from HAL : Dernières publications http://ift.tt/29uKgUv

[hal-01343734] Linear and nonlinear Granger causality between short-term and long-term interest rates during business cycles

This paper is about the causal relationship between short-term and long-term interest rates in the U.S. and Canada. To that end, we apply a linear Granger causality test introduced by Toda-Yamamoto (1995) and the nonlinear Granger causality test of Diks and Panchenko (2006). By combining linear causality effects with the nonlinear ones, it is seen that the most common Granger causality direction between short-term and long-term interest rates is a bidirectional one. We also find that nonlinear Granger causality can be found where no linear causality had been uncovered. Moreover, our findings show that during recent business cycles, the federal funds rate (in the U.S.) and the overnight rate (in Canada) still Granger-cause long-term interest rates significantly.

from HAL : Dernières publications http://ift.tt/29w5lKb

[hal-01343733] A two-sector model with target-return pricing in a stock-flow consistent framework

In this paper, we build a generalized Kaleckian two-sector model in a closed economy and explore the dynamics towards long-run positions. The model incorporates conflicting claims of labour and firms over income distribution and endogenous labour-saving technical progress. Adopting a stock-flow consistent framework, our simulation experiments yield the following results. First, the ‘paradox of thrift’ and the ‘paradox of costs’ hold, but the magnitude of the impact depends on the initial status of income distribution and monetary policy. Second, changes in autonomous labour-saving innovation might explain the phenomenon of the “new economy” of the second half of the 1990s within an alternative framework. Our model reinforces a post-Keynesian growth theory where aggregate demand is the crucial determinant of long-run positions as well as short-run positions, and shows that economic growth is demand-led and characterized by ‘path-dependency’.

from HAL : Dernières publications http://ift.tt/29uK87J

[hal-01343742] The Eurozone crisis: a balance-of-payment problem or a crisis due to a flawed monetary design?

Both Sergio Cesaratto and I see several flaws in the setup of the common currency Eurozone, and we both understand, in a similar way, the functioning of a monetary economy. The only point of disagreement it seems to me is that Cesaratto insists that the Eurozone crisis is a balance-of-payments problem, tied to current account deficits and capital outflows. But whereas the continuous loss of foreign reserves must eventually lead to some painful adjustment, Eurozone countries can never run out of TARGET2 balances, which can take unlimited negative values, so that the evolution of the balance of payments cannot be the source of the crisis. My view, and Roberto Frenkel’s, is that investors perceived, in contrast to other central banks, that the European Central Bank by convention and by design would decline to act as the purchaser of last resort until it became too late, which explains the speculative attacks against the securities issued by the governments of the Eurozone periphery.

from HAL : Dernières publications http://ift.tt/29w5vRR

[hal-01343743] A comment on Endogenous money and effective demand: a revolution or a step backward?

Steve Keen argues that post-Keynesians have not sufficiently emphasized the revolutionary character of endogenous money for macroeconomic theory, and that this should be done by recognizing that aggregate demand is equal to current or past income plus the change in debt. This equation, attributed in particular to Hyman Minsky, is discussed and questioned, and it is recalled that a similar equation had been proposed by Alfred Eichner. The consequences of bank credit for firms or households are further analysed within the context of the national accounts, and it is shown that one does not need a redefinition of aggregate demand and aggregate supply, in contrast to what is proposed by Keen.

from HAL : Dernières publications http://ift.tt/29uJKpH

vendredi 8 juillet 2016

Automatic Inference of Code Transforms and Search Spaces for Automatic Patch Generation Systems

Automatic Inference of Code Transforms and Search Spaces for Automatic Patch Generation Systems Long, Fan; Amidon, Peter; Rinard, Martin We present a new system, Genesis, that processes sets of human patches to automatically infer code transforms and search spaces for automatic patch generation. We present results that characterize the effectiveness of the Genesis inference algorithms and the resulting complete Genesis patch generation system working with real-world patches and errors collected from top 1000 github Java software development projects. To the best of our knowledge, Genesis is the first system to automatically infer patch generation transforms or candidate patch search spaces from successful patches.

from Computer Science and Artificial Intelligence Lab (CSAIL) http://ift.tt/29FcBVb

mardi 5 juillet 2016

Explaining variation in female labour force participation across Eastern Europe: The political economy of industrial upgrading and service transition.

Avlijaš, Sonia (2015) Explaining variation in female labour force participation across Eastern Europe: The political economy of industrial upgrading and service transition. PhD thesis, The London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29gSkTr

How intractable is intractable? A social psychological study of the permeability of imagined boundaries across groups in conflict

Nicholson, Cathryn (2016) How intractable is intractable? A social psychological study of the permeability of imagined boundaries across groups in conflict. PhD thesis, The London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29k2iar

European sanctions reconsidered: regime type, strategic bargaining, and the imposition of EU sanctions

Guijarro Usobiaga, Borja (2015) European sanctions reconsidered: regime type, strategic bargaining, and the imposition of EU sanctions. PhD thesis, The London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29gSzhl

Essays on the economic consequences of weather and climate change

Colmer, Jonathan (2016) Essays on the economic consequences of weather and climate change. PhD thesis, The London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29qxl46

Within and against the law: the politics of labour law in China's adaptive authoritarianism

Enjuto-Martinez, Regina (2016) Within and against the law: the politics of labour law in China's adaptive authoritarianism. PhD thesis, The London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29f1nnt

“Machiavelli of Peace”: Dag Hammarskjöld and the political role of the secretary-general of the United Nations

Frielingsdorf, Per-Axel (2016) “Machiavelli of Peace”: Dag Hammarskjöld and the political role of the secretary-general of the United Nations. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29lPxtS

Cognitive artefacts: remaking economies, 1917 - 1947

Vogelgsang, Tobias (2016) Cognitive artefacts: remaking economies, 1917 - 1947. PhD thesis, London School of Economics and Political Science (LSE).

from LSE Theses Online: No conditions. Results ordered -Date Deposited. http://ift.tt/29sG3A0

 

Blogger news

Blogroll

Fourni par Blogger.