15771 research outputs found
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Changing provider in an outsourced information system project. Good Practices for Knowledge Transfer
No full textOutsourcing information system development has become a common practice in companies. Many contributions were proposed for dealing with the management of such projects, and relationship betweenclient and vendor. But little is known concerning the way to manage the change of service provider in anon-going project. Our study concerns the transition from an outgoing service provider to an incoming oneduring an outsourcing development project in a public institution. This transition mainly consists intransferring the project. The transfer involves not only materials (documents and code) but also knowledge.Based on literature on knowledge transfer, we exhibit good practices for the transition phase of an on-goingoutsourced project. We show how we applied these good practices on a –real- application case.ouinonouirechercheInternationa
Targeted Communication and Investor Attention
No full textIn the spirit of Merton (1987) we find that targeted communication by firms raises investor attention. Continental European firms using English-language commercial press wires to disseminate corporate press releases exhibit less drift and more trading volume after their earnings announcements than firms that do not, consistent with communication on English speaking wires raising investor attention. Continental European firms using English-language commercial press wires also receive more press coverage from the English-language business press, and attract more foreign institutional investors. Our results are robust to self-selectionand other endogeneity concerns. Our findings are consistent with the idea that a targeted communication strategy helps firms improve recognition from investors.ouinonouirechercheInternationa
The Impact of Ageing on Demand, Factor Markets and Growth
No full textThis paper examines the channels through which ageing will shape the main economic factors that in turn affect potential growth; identifies current policy settings that may in fact amplify the adverse impact of demographic trends; and sets out policy reforms that will work to temper the effects of ageing on growth. The paper begins with a brief discussion of demographic issues. The analysis first focuses on the impact of these trends on the future level and structure of consumption, which may affect aggregate saving and the structure of the economy, respectively. Then, it explores the main channels through which ageing affects the supply side of the economy following a production function approach: capital markets, labour markets and productivity. The empirical analysis focuses on a subset of large OECD countries with differing ageing patterns and generosity of pension systems. Using a simple general equilibrium overlapping generations model and considering alternative reform scenarios, some illustrative simulations are presented decomposing the effects of ageing on potential GDP per capita growth and economic convergence within OECD countries.nonnonouirechercheInternationa
Challenges of the Anthropocene epoch – supporting multi-focus research
No full textWork on multiscale issues presents countless challenges that have been long attacked by GIScience researchers. Most results either concentrate on modeling or on data structures/database aspects. Solutions go either towards generalization (and/or virtualization of distinct scales) or towards linking entities of interest across scales. However, researchers seldom take into account the fact that multiscale scenarios are increasingly constructed cooperatively, and require distinct perspectives of the world. The combination of multiscale and multiple perspectives per scale constitutes what we call multifocus research. This paper presents our solution to these issues. It builds upon a specific database version model – the multiversion MVBD – which has already been successfully implemented in several geospatial scenarios, being extended here to support multi-focus research.nonouirechercheInternationa
Policy analytics: an agenda for research and practice
No full textThe growing impact of the “analytics” perspective in recent years, which integrates advanced data-mining and learning methods, is often associated with increasing access to large databases and with decision support systems. Since its origin, the field of analytics has been strongly business-oriented, with a typical focus on data-driven decision processes. In public decisions, however, issues such as individual and social values, culture and public engagement are more important and, to a large extent, characterise the policy cycle of design, testing, implementation, evaluation and review of public policies. Therefore public policy making seems to be a much more socially complex process than has hitherto been considered by most analytics methods and applications. In this paper, we thus suggest a framework for the use of analytics in supporting the policy cycle—and conceptualise it as “Policy Analytics”.nonouirechercheInternationa
The New Dynamics of Knowledge and the Persistence of Power Relations: The Limited Impact of Important Transformations in Occupational Health Expertise
No full textCet article analyse les transformations contemporaines de la production de connaissances et d’expertise en santé au travail en replaçant ces évolutions avec les spécificités et les évolutions récentes de ce secteur d’intervention publique. Après avoir montré comment les changements des politiques de santé publique contraignent à un certain nombre de transformations dans le domaine de la santé au travail, notamment en obligeant à créer de nouvelles instances d’expertises, cet article analyse comment l’expertise des risques professionnels s’institutionnalise et les effets induits sur les modalités de la prise de décision dans ce domaine. Il montre qu’au-delà de bouleversements importants, les rapports de pouvoir qui caractérisent ce domaine d’intervention restent relativement stables. Au delà du cas de la santé au travail, cet article invite à reposer les questions de la production de connaissances et de l’expertise en les mettant en perspective avec les rapports de force qui structurent un secteur d’intervention publique.This article analyses contemporary changes in the production of knowledge and expertise pertaining to occupational health, by relating them to the characteristics of this public policy sector and recent developments within it. The article first shows how changes in public health policy necessarily induce certain changes in occupational health, for instance by making the creation of new expert agencies mandatory. It then examines the institutionalization of expertise on occupational risks, along with the impact this has on the modalities of decision making in a specific field. It explains that in spite of huge changes, the power relations characterizing this public policy domain remain relatively stable. Finally, apart from the case of occupational health, this article raises the question again of the production for knowledge and expertise, by relating them to the power plays structuring a public policy sector.nonouirechercheNationa
From preference logics to preference languages, and back
No full textPreference logics and AI preference representation languages are both concerned with reasoning about preferences on combinatorial domains, yet so far these two streams of research have had little interaction. This paper contributes to the bridging of these areas. We start by constructing a “prototypical” preference logic, which combines features of existing preference logics, and then we show that many well-known preference languages, such as CP-nets and its extensions, are natural fragments of it. After establishing useful characterizations of dominance and consistency in our logic, we study the complexity of satisfiability in the general case as well as for meaningful fragments, and we study the expressive power as well as the relative succinctness of some of these fragments. 1.nonouirechercheInternationa
Labeled Traveling Salesman Problems: Complexity and approximation
No full textWe consider labeled Traveling Salesman Problems, defined upon a complete graph of n vertices with colored edges. The objective is to find a tour of maximum or minimum number of colors. We derive results regarding hardness of approximation and analyze approximation algorithms, for both versions of the problem. For the maximization version we give a View the MathML source-approximation algorithm based on local improvements and show that the problem is APX-hard. For the minimization version, we show that it is not approximable within n1−ϵ for any fixed ϵ>0. When every color appears in the graph at most r times and r is an increasing function of n, the problem is shown not to be approximable within factor O(r1−ϵ). For fixed constant r we analyze a polynomial-time (r+Hr)/2-approximation algorithm, where Hr is the rth harmonic number, and prove APX-hardness for r=2. For all of the analyzed algorithms we exhibit tightness of their analysis by provision of appropriate worst-case instances.nonouirechercheInternationa
Trading Volume and Arbitrage
No full textDecomposing returns into market and stock specific components is common practice and forms the basis of popular asset pricing models. What about volume? Can volume be decomposed in the same way as returns? Lo and Wang (2000) suggest such a decomposition. Our paper contributes to this literature in two different ways. First, we provide a model to explain why volumes deviate from the benchmark. Our interpretation is in terms of arbitrage strategies and liquidity. Second, we propose a new efficient screening tool that allows practitioners to extract specific information from volume time series. We provide an empirical illustration of the relevance and the possible uses of our approach on daily data from the FTSE index from 2000 to 2002.nonouirechercheInternationa
Réponses des consommateurs à la suppression des suremballages sur les MDD
No full textLa suppression du suremballage de leurs MDD offre-t-elle aux enseignes un outil de positionnement responsable sans conséquence sur leur intention d’achat ? S’appuyant sur la théorie de l’attribution, cette recherche montre par le biais d’une expérimentation conduite sur 217 répondants français que la suppression du suremballage améliore effectivement le caractère écologique perçu des MDD classiques, mais qu’elle détériore globalement leur intention d’achat via l’effet médiateur de leurs qualité et praticité perçues. Elle n’a toutefois pas d’influence sur l’intention d’achat des MDD économiques.Could eliminating overpackaging from private labels be a lever for a responsible positioning without any effect on purchase intention? Drawing on the attribution theory framework, this research uses an experiment on 217 French respondents and shows that eliminating overpackaging does have an influence on mimic private labels’ ecological image, but damages their purchase intention through the mediating effect of perceived quality and convenience. It has however no influence on generic private labels’ purchase intention.nonouirechercheInternationa