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See detailRisk Horizon and Expected Market Returns
Hübner, Georges ULg; Lejeune, Thomas ULg

E-print/Working paper (2012)

The paper proposes an equilibrium asset pricing model that accounts of the incomplete information on returns distribution and investors' preferences. Only moments up to order four of unknown unconditional ... [more ▼]

The paper proposes an equilibrium asset pricing model that accounts of the incomplete information on returns distribution and investors' preferences. Only moments up to order four of unknown unconditional distribution can be observed, and the model does not impose that portfolio diversi fication or moments preference should hold. Using Chebyshev-type of inequalities, an intuitive risk measure (risk horizon) is introduced with reference to the speed of convergence of a security's mean return to its expectations. By an arbitrage argument, this risk measure is related to the horizon of treasury securities in a system of equations that allows the calibration of the model parameters using term structure information. In particular, the expected return on the market portfolio can be endogenously estimated inside this system. The model calibration on U.S. market data provides plausible parameters estimates and interesting cyclical patterns in the time series of the expected return. The empirical relevance of these estimates is examined with tests of statistical and economic predictive ability for stock excess returns. The results provide signi ficant evidence on the added value of the estimates when compared to popular predictors found in the literature (see a.o. Lettau and Ludvigson, 2001; Rapach and Wohar, 2006; Goyal and Welch, 2008). [less ▲]

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See detailVers une typologie de la réflexivité
Demoulin, Laurent ULg

E-print/Working paper (2012)

Il sera ici question de phénomènes réflexifs qui, au sein d’un texte littéraire, produisent des écarts sensibles et rompent le processus classique de la représentation du réel. Les cas rencontrés sont ... [more ▼]

Il sera ici question de phénomènes réflexifs qui, au sein d’un texte littéraire, produisent des écarts sensibles et rompent le processus classique de la représentation du réel. Les cas rencontrés sont étonnamment divers, tant en ce qui concerne leur structure que les effets produits. C’est pourquoi l’on se propose de les classer en six catégories distinctes : réflexivité autotélique, réflexivité poétique, réflexivité linguistique, réflexivité de l’énonciateur, réflexivité conative et réflexivité référentielle. [less ▲]

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See detailNEW CHALLENGES FOR 21ST CENTURY COMPETITION AUTHORITIES
Petit, Nicolas ULg

E-print/Working paper (2012)

This paper discusses challenges for competition authorities in the 21st century. Those challenges were identified on the basis of a statistical review of the articles published since January 2011 in five ... [more ▼]

This paper discusses challenges for competition authorities in the 21st century. Those challenges were identified on the basis of a statistical review of the articles published since January 2011 in five major antitrust law journals. The assumption underlying this literature review is that the topics that statistically attract the most the attention from contemporary antitrust scholars are those that will likely constitute the main challenges for 21st century competition authorities. [less ▲]

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See detailOrganizational and Institutional Arrangements for e-Government: A Preliminary Report on Contemporary IT Management Approaches in US State Governments
Markus, M. Lynne; Jacobson, Dax D.; Bui, Quang Neo et al

E-print/Working paper (2012)

The success of e-government is believed to depend in part on the organizational and institutional arrangements that governments enact for the management of their IT resources. This paper develops the ... [more ▼]

The success of e-government is believed to depend in part on the organizational and institutional arrangements that governments enact for the management of their IT resources. This paper develops the conceptualization of IT management arrangements by considering possible interactions between two dimensions — 1) the organization of IT activities and 2) control over decisions about IT activities (also known as governance) — for each of two categories of IT activities — 1) IT projects (such as website development) and 2) IT services (such as the operation of networks). In addition, the paper provides preliminary empirical evidence obtained from applying this expanded conceptualization in the context of American state governments. Many states appear to employ centralization of IT activities to offset decentralization of IT control and vice versa. Consequently, neither dimension alone provides a good characterization of governmental IT management arrangements. These findings have the potential to enhance our understanding of the barriers to, and enablers of, e-government success. [less ▲]

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See detailSummer 2012 & The Blues - Chicago Blues Festival , Juin 2012
Sacré, Robert ULg

E-print/Working paper (2012)

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See detailSocial Security, Ageing and Economic Integration
Artige, Lionel ULg; Dedry, Antoine; Pestieau, Pierre ULg

E-print/Working paper (2012)

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See detailThe EMES Approach of Social Enterprise in a Comparative Perspective
Defourny, Jacques ULg; Nyssens, Marthe

E-print/Working paper (2012)

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See detailSummer 2012 & The blues 2012 pt 2 - Aurora's Blues on the Fox, June 2012
Sacré, Robert ULg

E-print/Working paper (2012)

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See detailNotes éparses d'un lecteur enthousiaste
Demoulin, Laurent ULg

E-print/Working paper (2012)

Compte rendu de "Carnet de Corée", ouvrage de Serge Delaive, mêlant littérature et photographies au sujet de trois voyages effectués en Corée sur les traces de la mère de sa compagne.

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See detailDe nieuwe fiscale antimisbruikregel en de gevolgen voor vermogensplanning
Bourgeois, Marc ULg; Nollet, Aymeric ULg

E-print/Working paper (2012)

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See detailA New Shift-Share Method
Artige, Lionel ULg; Van Neuss, Leif ULg

E-print/Working paper (2012)

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See detailWanted ! Avez-vous vu ces plantes ? La conservation des plantes messicoles dans le cadre du Programme Agroenvironnemental wallon
Piqueray, Julien ULg; Gilliaux, Valentin ULg; Mahy, Grégory ULg

E-print/Working paper (2012)

Afin de mener à bien un projet de conservation des plantes messicoles menacées, la Faculté AgroBioTech de Gembloux appelle à diffuser vos observations de terrain au DEMNA

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See detailGenerational Accounting in Belgium: Fiscal Sustainability at a Glance
Decoster, André; Flawinne, Xavier ULg; Vanleenhove, Pieter

E-print/Working paper (2012)

Detailed reference viewed: 61 (13 ULg)
See detailLes Wallons du Wisconsin
Lempereur, Françoise ULg

E-print/Working paper (2012)

In the middle of the XIXe century, thousands of Walloon left Belgium to settle in Wisconsin, more than 3100 miles away.

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See detailEcaussinnes 2012 - Spring Blues Festival
Sacré, Robert ULg

E-print/Working paper (2012)

Compte-rendu du Spring Blues Festival d'Ecaussinnes, le 19 mai 2012

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See detailRenforcer la formation en sciences humaines en réduisant l’histoire-géo : cherchez l’erreur!
Jadoulle, Jean-Louis ULg

E-print/Working paper (2012)

Cette "carte blanche" fait suite à la décision de la Ministre de l'Enseignement obligatoire, Marie-Dominique Simonet, de réviser les grilles - horaires de l'enseignement qualifiant. Elle reprend la teneur ... [more ▼]

Cette "carte blanche" fait suite à la décision de la Ministre de l'Enseignement obligatoire, Marie-Dominique Simonet, de réviser les grilles - horaires de l'enseignement qualifiant. Elle reprend la teneur d'une lettre qui lui a été adressée et qui a été co-signée par plus de 140 enseignants, formateurs d'enseignants et membres de la société civile. [less ▲]

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See detailLe public est tenu à distance
Corswarem, Emilie ULg; Levaux, Christophe ULg

E-print/Working paper (2012)

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See detailTraffic Situation Assessment and Intervention Strategy of a Collision Avoidance System based on Galileo Satellite Positioning
Christen, Fréderic ULg; Ewald, Christian; Eckstein, Lutz et al

E-print/Working paper (2012)

Nowadays, collision avoidance systems (CAS) are an intensive research topic since the majority of all traffic accidents are collisions that are caused due to inattention or unadjusted driving behavior of ... [more ▼]

Nowadays, collision avoidance systems (CAS) are an intensive research topic since the majority of all traffic accidents are collisions that are caused due to inattention or unadjusted driving behavior of the driver. Up to date prototypic CAS are based on on-board environmental sensors, such as camera or radar systems, that scan the vehicle's surrounding environment in order to assess the situation's hazardousness. The functionality of the used sensors under varying environmental conditions and the limited sensor covering area require an enormous effort to ensure a reliable detection of obstacles, and thus limit the application of the systems. In order to expand the operating field of such systems, a Galileo-based CAS will be developed within the project ‘Galileo above’ (application centre for ground based traffic). This advanced driver assistance system (ADAS) detects surrounding vehicles that are on collision course and reacts autonomously, if the driver does not intervene to avoid the crash. For this purpose the system initiates an emergency stop and/or an emergency steering maneuver. For the development of the CAS the Galileo test centre automotiveGATE in Aldenhoven, Germany will be used. On this test area pseudolites will be installed which provide Galileo-like navigation signals. Thus, the development respectively tuning of Galileo-based vehicle systems will be enabled, so as to have them available on the market when the Galileo satellite system reaches its full operational capability (FOC). The focus of this paper is on the traffic situation assessment and intervention strategy of the CAS. This includes the perception and analysis of the driving situation, the detection of potential collision situation, the definition of an adequate system reaction and the planning of an evasion trajectory. Furthermore, an outlook on the model predictive control for longitudinal and/or lateral control (braking and/or steering maneuver) will be presented. [less ▲]

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See detailInstitutional Change and Legislative Stability: Explicit and Contested Decision-Making in the EU Council (1995-2010)
Van Aken, Wim ULg

E-print/Working paper (2012)

In contrast to general expectations the growth of EU membership as well as European treaty reform has not had any significant impact on the Council’s overall legislative and roll call activity. On the ... [more ▼]

In contrast to general expectations the growth of EU membership as well as European treaty reform has not had any significant impact on the Council’s overall legislative and roll call activity. On the basis of a new dataset representing the total population of public roll calls and recorded votes in the Council this paper explains why the EU Council has been so successful in guaranteeing legislative and roll call stability between 1995 and 2010. The quantitative and qualitative analysis finds that frontloading legislation, changing voting behaviour, reinforcement of existing coalition patterns and the successful adjustment of newer Member States to the EU Council have contributed to the EU Council’s decision-making capacity during the observed 16 years. In explaining the apparent contradiction between institutional change and the Council’s legislative stability this paper contributes to our knowledge of the functioning, the decision-making processes and the geography of contestation in the EU Council. [less ▲]

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See detailThe size and book-to-market effects revisited
Lambert, Marie ULg; Hübner, Georges ULg

E-print/Working paper (2012)

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See detailSOUTHERN BLUES NIGHT Heerlen, Hollande) 2012
Sacré, Robert ULg

E-print/Working paper (2012)

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See detailRossano Rosi: triangle amoureux et paternité
Demoulin, Laurent ULg

E-print/Working paper (2012)

Compte rendu du roman de Rossano Rosi Stabat Pater paru aux Impressions nouvelles en mars 2012.

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See detailDans le discontinu de la vie
Demoulin, Laurent ULg

E-print/Working paper (2012)

Compte rendu du roman de Caroline Lamarche La Chienne de Naha paru chez Gallimard en janvier 2012.

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See detailEchecs
Demoulin, Laurent ULg

E-print/Working paper (2012)

Echecs est un roman inédit de Jean-Philippe Toussaint, antérieur à La Salle de bain. Il est ici édité avec un apparat critique: variantes et notes critiques.

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See detailOxford Centre for Evidence‐Based Medicine 2011 Levels of Evidence ‐ Traduction française
OCEBM Levels of Evidence Working Group; Durieux, Nancy ULg; Pasleau, Françoise ULg et al

E-print/Working paper (2012)

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See detailHeinrich Rickert's Philosophy of History And Its Reception 1896-1936: An Annotated Bibliography
Dewalque, Arnaud ULg

E-print/Working paper (2012)

Annotated bibliography of the main philosophical texts which testify the reception of Heinrich Rickert's much-discussed view on historical sciences from 1896 to 1936.

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See detailHow to optimally load a set of containers into an aircraft
Schyns, Michael ULg; Limbourg, Sabine ULg; Laporte, Gilbert

E-print/Working paper (2012)

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See detailAccrued Pension Rights in Belgium: Microsimulation of Reforms
Jousten, Alain ULg; Perelman, Sergio ULg; Tarantchenko, Ekaterina ULg et al

E-print/Working paper (2012)

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See detailLes enjeux prospectifs wallons à la lumière d’un dispositif participatif
Guyot, Jean-Luc; Rieppi, Stéphane ULg; Van Cutsem, Michaël et al

E-print/Working paper (2012)

La prospective a souvent recours à la démarche participative. Fréquemment, dans son travail analytique, le prospectiviste fait intervenir les acteurs concernés par le système qu'il examine, que ceux-ci ... [more ▼]

La prospective a souvent recours à la démarche participative. Fréquemment, dans son travail analytique, le prospectiviste fait intervenir les acteurs concernés par le système qu'il examine, que ceux-ci opèrent dans ce système ou qu’ils possèdent une expertise particulière par rapport à celui-ci. Dans la majorité des cas, cette intervention s’effectue au cours de l’exercice prospectif. Le présent working paper expose un autre type de situation : l’intervention et la participation des acteurs se placent ici en amont du travail prospectif, au moment de la délimitation des enjeux et des thématiques à considérer dans le cadre du développement d’un programme de recherche. L'expérience présentée par les auteurs, bien qu’elle recoure à l’utilisation d’un outil relativement classique en prospective, à savoir le Delphi, revêt un aspect original. Développée auprès de deux publics distincts, des équipes de recherche d’une part et des membres de l’administration wallonne, d’autre part, elle a permis d’identifier un certain nombre d’enjeux prospectifs majeurs pour la Wallonie et de définir des objets de recherche en rapport avec ces derniers. L'identification et la présentation de ces enjeux fait l’objet du présent texte. Dans un premier temps, celui-ci se propose de décrire le processus d’identification de ces enjeux et, dans un second temps, d’expliciter la nature de ceux-ci. [less ▲]

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See detailCinéma 3D: d'une révolution à l'autre
Thonon, Jonathan ULg

E-print/Working paper (2012)

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See detaild'Hane-Steenhuyse (Charles-François)
Vandersmissen, Jan ULg

E-print/Working paper (2012)

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See detailCinq jalons de réflexion autour d’un projet de recherche
Badir, Sémir ULg

E-print/Working paper (2012)

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See detailBringing Belgian public finances to a sustainable path
Jousten, Alain ULg; Hoj, Jens; Kozluk, Tomasz

E-print/Working paper (2012)

Economic growth is projected to be strengthening from mid-2011 onwards, but will be insufficient to restore the sustainability of public finances. The Belgian strategy to prefund ageing costs by ... [more ▼]

Economic growth is projected to be strengthening from mid-2011 onwards, but will be insufficient to restore the sustainability of public finances. The Belgian strategy to prefund ageing costs by generating fiscal surpluses to bring down public debt was derailed by the global crisis. Restoring the strategy is a priority, especially as spreads on Belgian debt have increased. This will require cuts in public spending, improving efficiency of policies, containing the growth of ageing-related costs and making the tax system more conducive to growth. While past experiences, such as in the 1990s, have shown that successful large consolidations are feasible, the task seems even more difficult this time as potential growth will be muted and interest rates are likely to increase. In this context, a credible fiscal consolidation plan requires the participation of all governments. Its effectiveness can be strengthened by improving the fiscal framework, in particular by introducing multi-year budgets, annual expenditure rules consistent with long-term targets and an enhanced role of an independent fiscal policy watchdog [less ▲]

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See detailSolvyns (François-Balthazar)
Vandersmissen, Jan ULg

E-print/Working paper (2012)

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See detailThe Retirement of the Migrant Labor Force: Pension Portability and Beyond
Jousten, Alain ULg

E-print/Working paper (2012)

The specificities of the workforce with a migrant background are often neglected in studies of retirement. Similarly, many studies of migration’s impact on pensions often focus on aggregate outcomes – ... [more ▼]

The specificities of the workforce with a migrant background are often neglected in studies of retirement. Similarly, many studies of migration’s impact on pensions often focus on aggregate outcomes – system sustainability or distributive characteristics. The present paper provides a fresh look at the nexus between these two literatures. It discusses the impact of the European social security coordination mechanisms on individual decision‐making and on the functioning of social security systems – with a focus on retirement. The paper argues that such effects are non‐negligible and are likely to have major policy consequences. [less ▲]

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See detailLow-rank optimization with trace norm penalty
Mishra, Bamdev ULg; Meyer, Gilles ULg; Bach, Francis et al

E-print/Working paper (2012)

The paper addresses the problem of low-rank trace norm minimization. We propose an algorithm that alternates between fixed-rank optimization and rank-one updates. The fixed-rank optimization is ... [more ▼]

The paper addresses the problem of low-rank trace norm minimization. We propose an algorithm that alternates between fixed-rank optimization and rank-one updates. The fixed-rank optimization is characterized by an efficient factorization that makes the trace norm differentiable in the search space and the computation of duality gap numerically tractable. The search space is nonlinear but is equipped with a particular Riemannian structure that leads to efficient computations. We present a second-order trust-region algorithm with a guaranteed quadratic rate of convergence. Overall, the proposed optimization scheme converges super-linearly to the global solution while still maintaining complexity that is linear in the number of rows of the matrix. To compute a set of solutions efficiently for a grid of regularization parameters we propose a predictor-corrector approach on the quotient manifold that outperforms the naive warm-restart approach. The performance of the proposed algorithm is illustrated on problems of low-rank matrix completion and multivariate linear regression. [less ▲]

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See detailA Riemannian geometry for low-rank matrix completion
Mishra, Bamdev ULg; Karavadi, Adithya Apuroop; Sepulchre, Rodolphe ULg

E-print/Working paper (2012)

We propose a new Riemannian geometry for fixed-rank matrices that is specifically tailored to the low-rank matrix completion problem. Exploiting the degree of freedom of a quotient space, we tune the ... [more ▼]

We propose a new Riemannian geometry for fixed-rank matrices that is specifically tailored to the low-rank matrix completion problem. Exploiting the degree of freedom of a quotient space, we tune the metric on our search space to the particular least square cost function. At one level, it illustrates in a novel way how to exploit the versatile framework of optimization on quotient manifold. At another level, our algorithm can be considered as an improved version of LMaFit, the state-of-the-art Gauss-Seidel algorithm. We develop necessary tools needed to perform both first-order and second-order optimization. In particular, we propose gradient descent schemes (steepest descent and conjugate gradient) and trust-region algorithms. We also show that, thanks to the simplicity of the cost function, it is numerically cheap to perform an exact linesearch given a search direction, which makes our algorithms competitive with the state-of-the-art on standard low-rank matrix completion instances. [less ▲]

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See detailFixed-rank matrix factorizations and Riemannian low-rank optimization
Mishra, Bamdev ULg; Meyer, Gilles ULg; Bonnabel, Silvere et al

E-print/Working paper (2012)

Motivated by the problem of learning a linear regression model whose parameter is a large fixed-rank non-symmetric matrix, we consider the optimization of a smooth cost function defined on the set of ... [more ▼]

Motivated by the problem of learning a linear regression model whose parameter is a large fixed-rank non-symmetric matrix, we consider the optimization of a smooth cost function defined on the set of fixed-rank matrices. We adopt the geometric optimization framework of optimization on Riemannian matrix manifolds. We study the underlying geometries of several well-known fixed-rank matrix factorizations and then exploit the Riemannian geometry of the search space in the design of a class of gradient descent and trust-region algorithms. The proposed algorithms generalize our previous results on fixed-rank symmetric positive semidefinite matrices, apply to a broad range of applications, scale to high-dimensional problems and confer a geometric basis to recent contributions on the learning of fixed-rank non-symmetric matrices. We make connections with existing algorithms in the context of low-rank matrix completion and discuss relative usefulness of the proposed framework. Numerical experiments suggest that the proposed algorithms compete with the state-of-the-art and that manifold optimization offers an effective and versatile framework for the design of machine learning algorithms that learn a fixed-rank matrix. [less ▲]

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See detailAn expanding Universe without dark matter and dark energy
Magain, Pierre ULg

E-print/Working paper (2012)

Assuming that observers located inside the Universe measure a time flow which is different from the time appearing in the Friedmann-Lemaıtre equation, and determining this time flow such that the Universe ... [more ▼]

Assuming that observers located inside the Universe measure a time flow which is different from the time appearing in the Friedmann-Lemaıtre equation, and determining this time flow such that the Universe always appears flat to these observers, we derive a simple cosmological model which allows to explain the velocity dispersions of galaxies in galaxy clusters without introducing dark matter. It also solves the horizon problem without recourse to inflation. Moreover, it explains the present acceleration of the expansion without any resort to dark energy and provides a good fit to the observations of distant supernovæ. Depending on the present value of the matter-energy density, we calculate an age of the Universe between 15.4 and 16.5 billion years, ignificantly larger than the 13.7 billion years of the standard CDM model. Our model has a slower expansion rate in the early epochs, thus leaving more time for the formation of structures such as stars and galaxies. [less ▲]

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See detailStrategic bypass deterrence
Bloch, Francis; Gautier, Axel ULg

E-print/Working paper (2012)

In liberalized network industries, entrants can either compete for service using the existing infrastructure (access) or deploy their own infrastructure capacity (bypass). In this paper, we demonstrate ... [more ▼]

In liberalized network industries, entrants can either compete for service using the existing infrastructure (access) or deploy their own infrastructure capacity (bypass). In this paper, we demonstrate that, under the threat of bypass, the access price set by an unregulated and vertically integrated incumbent is compatible with productive efficiency. This means that the entrant bypasses the existing infrastructure only if it can produce the network input more efficiently. We show that the incumbent lowers the access price compared to the ex-post efficient level to strategically deter inefficient bypass by the entrant. Accordingly, from a productive efficiency point of view, there is no need to regulate access prices when the entrant has the option to bypass. Despite that, we show that restricting the possibilities of access might be profitable for consumers and welfare because competition is fiercer under bypass. [less ▲]

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See detailRose-Marie François, L'Adieu, Une promenade douce-amère
Demoulin, Laurent ULg

E-print/Working paper (2011)

Compte rendu du recueil de poèmes L'Adieu de Rose-Marie François

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See detailMeasuring poverty without the mortality paradox
Lefebvre, Mathieu ULg; Pestieau, Pierre ULg; Ponthiere, Grégory ULg

E-print/Working paper (2011)

Under income-differentiated mortality, poverty measures reflect not only the "true" poverty, but, also, the interferences or noise caused by the survival process at work. Such interferences lead to the ... [more ▼]

Under income-differentiated mortality, poverty measures reflect not only the "true" poverty, but, also, the interferences or noise caused by the survival process at work. Such interferences lead to the Mortality Paradox: the worse the survival conditions of the poor are, the lower the measured poverty is. We examine several solutions to avoid that paradox. We identify conditions under which the extension, by means of a fictitious income, of lifetime income profiles of the prematurely dead neutralizes the noise due to differential mortality. Then, to account not only for the "missing" poor, but, also, for the "hidden" poverty (premature death), we use, as a fictitious income, the welfare-neutral income, making indifferent between life continuation and death. The robustness of poverty measures to the extension technique is illustrated with regional Belgian data. [less ▲]

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See detailEvidence on the Determinants of Innovation in a Sample of Spanish firms
Artige, Lionel ULg

E-print/Working paper (2011)

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See detailPolitique fiscale: quelles perspectives à moyen terme?
Jousten, Alain ULg

E-print/Working paper (2011)

The paper discusses the medium term adequacy of belgian tax policy. The paper reviews the architecture of the current system as well as its recent reforms. It draws on international experience to ... [more ▼]

The paper discusses the medium term adequacy of belgian tax policy. The paper reviews the architecture of the current system as well as its recent reforms. It draws on international experience to highlight the need for substantial structural reforms of the main tax instuments. [less ▲]

Detailed reference viewed: 102 (16 ULg)
See detailDubois La Liberté
Demoulin, Laurent ULg

E-print/Working paper (2011)

Compte rendu de l'ouvrage de Jacques Dubois Les Figures du désir.

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See detailNew Orleans Jazz & Heritage Festival 2011 - compte-rendu
Sacré, Robert ULg

E-print/Working paper (2011)

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See detailIntermediaries, transport costs and interlinked transactions
Lefevre, Mélanie ULg; Tharakan, Joseph ULg

E-print/Working paper (2011)

Transport costs play a key role in agricultural markets in developing countries and are one of the causes of poverty amongst farmers that are geographically isolated. Another characteristic of ... [more ▼]

Transport costs play a key role in agricultural markets in developing countries and are one of the causes of poverty amongst farmers that are geographically isolated. Another characteristic of agricultural markets is that they often involve interlinked transactions. However, the existing theoretical literature on interlinked transactions does not take into account the existence of transport costs. This paper develops a model of input-output interlinked contracts between geographically dispersed farmers and a trader, whether this trader is for-profit or non-profit. We derive implications of imposing either uniform or mill pricing policies, as opposed to spatial price discrimination. Impact on profit, farmers' income, level of production, social welfare and regional disparities are investigated. [less ▲]

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See detailDAVID HONEY BOY EDWARDS R.I.P.
Sacré, Robert ULg

E-print/Working paper (2011)

Notice nécrologique d'une icone du blues africain-américain

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See detailNew Orleans Jazz & Heritage Festival 2011 - compte-rendu 3e partie
Sacré, Robert ULg

E-print/Working paper (2011)

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See detailThe HARPS search for southern extra-solar planets XXXII. Only 4 planets in the Gl~581 system
Forveille, T.; Bonfils, X.; Delfosse, X. et al

E-print/Working paper (2011)

The Gl 581 planetary system has generated wide interest, because its 4 planets include both the lowest mass planet known around a main sequence star other than the Sun and the first super-Earth planet in ... [more ▼]

The Gl 581 planetary system has generated wide interest, because its 4 planets include both the lowest mass planet known around a main sequence star other than the Sun and the first super-Earth planet in the habitable zone of its star. A recent paper announced the possible discovery of two additional super-Earth planets in that system, one of which would be in the middle of the habitable zone of Gl 581. The statistical significance of those two discoveries has, however, been questioned. We have obtained 121 new radial velocity measurements of Gl 581 with the HARPS spectrograph on the ESO 3.6 m telescope, and analyse those together with our previous 119 measurements of that star to examine these potential additional planets. We find that neither is likely to exist with their proposed parameters. We also obtained photometric observations with the 2.5 m Isaac Newton Telescope during a potential transit of the inner planet, Gl 581e, which had a 5% geometric transit probability. Those observations exclude transits for planet densities under 4 times the Earth density within -0.2 sigma to +2.7 sigma of the predicted transit center. [less ▲]

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See detailFESTIVAL INTERNATIONAL DE LAFAYETTE 2011 compte rendu
Sacré, Robert ULg

E-print/Working paper (2011)

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See detailBill Viola, L'espace d'un instant
Thonon, Jonathan ULg

E-print/Working paper (2011)

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See detailNew Orleans Jazz & Heritage Festival - compte-rendu 2e partie
Sacré, Robert ULg

E-print/Working paper (2011)

suite du compte rendu

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See detailNew Orleans Jazz & Heritage Festival 2011 - compte-rendu
Sacré, Robert ULg

E-print/Working paper (2011)

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Peer Reviewed
See detailThe changing face of disability insurance
Jousten, Alain ULg; Lefebvre, Mathieu ULg; Perelman, Sergio ULg

E-print/Working paper (2011)

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See detailLe phénomène de l’"empowerment"
Blavier, André ULg

E-print/Working paper (2011)

L'empowerment repose sur 4 tendances technologiques majeures: les technologies sociales et de crowdsourcing, les technologies mobiles intelligentes, les technologies de vidéo pervasive, et, enfin, les ... [more ▼]

L'empowerment repose sur 4 tendances technologiques majeures: les technologies sociales et de crowdsourcing, les technologies mobiles intelligentes, les technologies de vidéo pervasive, et, enfin, les services de Cloud Computing. [less ▲]

Detailed reference viewed: 66 (26 ULg)
See detailPauvreté et mortalité différentielle chez les personnes âgées
Lefebvre, Mathieu ULg; Pestieau, Pierre ULg; ponthiere, gregory

E-print/Working paper (2011)

Cette note a pour objectif d’illustrer, dans le cas de la Belgique et de ses régions, un problème particulier posé par la mesure de la pauvreté. Etant donné que la mortalité varie selon le niveau de ... [more ▼]

Cette note a pour objectif d’illustrer, dans le cas de la Belgique et de ses régions, un problème particulier posé par la mesure de la pauvreté. Etant donné que la mortalité varie selon le niveau de revenu – les personnes aux revenus plus élevés vivant plus longtemps, en moyenne, que les personnes aux revenus plus faibles – les taux de pauvreté calculés pour les classes âgées dépendent non seulement de ce que l’on pourrait appeler la vraie pauvreté, mais aussi de la sélection induite par la mortalité différentielle selon le revenu. En calculant les taux de pauvreté que l’on observerait si des personnes avec différents niveaux de revenus avaient toutes la même espérance de vie, on peut ainsi estimer la vraie pauvreté, en neutralisant les interférences dues à la mortalité différentielle. Cet ajustement des mesures de pauvreté est particulièrement intéressant pour la Belgique, où les écarts de longévité entre Flamands et Francophones et entre riches et moins riches sont importants. [less ▲]

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See detailDe quelle totalité l'énonciation journalistique est-elle le fragment ?
Servais, Christine ULg

E-print/Working paper (2011)

Le discours d'information médiatique se caractérise certes par sa forme fragmentaire quant aux énoncés (par définition ouverts sur l'avenir et s’additionnant sans suite cohérente), mais encore par une ... [more ▼]

Le discours d'information médiatique se caractérise certes par sa forme fragmentaire quant aux énoncés (par définition ouverts sur l'avenir et s’additionnant sans suite cohérente), mais encore par une forme d'énonciation « floue » parce que collective, voire institutionnelle. Nous examinons ici la manière dont, dans le discours journalistique, la dimension collective de la langue est rapportée sur la parole et sur l’acte d’énonciation. Nous considérons que l’énonciation journalistique est, à plusieurs titres, inachevée, notamment en ce que sa performativité ne va pas jusqu’à la responsabilité assumée de l’énonciateur. Il s’agit de tenter d’identifier les lignes de fracture qui traversent le sujet d’énonciation journalistique et, avec elles, le partage de responsabilités qui en est induit. Notre ambition est d’établir un lien entre la division propre à l’énonciation journalistique et un questionnement sur le partage de l’espace et de la parole publics, ce qui suppose de se demander, notamment en intégrant à l’analyse le concept derridien de « téléiopoièse », où et comment se situe, dans cette disposition, la participation du destinataire. [less ▲]

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See detailWillingness-to-pay for local milk-based dairy products in Senegal
Lefevre, Mélanie ULg

E-print/Working paper (2011)

This paper aims to evaluate Senegalese consumers' willingness-to-pay (WTP) for local fresh milk-based products, in opposition to the ones produced with imported powder. Using data from a choice-based ... [more ▼]

This paper aims to evaluate Senegalese consumers' willingness-to-pay (WTP) for local fresh milk-based products, in opposition to the ones produced with imported powder. Using data from a choice-based-conjoint analysis conducted on 400 households in the region of Dakar, we evaluate the premium that consumers are willing to pay for fresh raw material (rather than powder) in the composition of sour milk. Based on an Ordered Probit Model, the results show evidence for a positive WTP for fresh raw material, which may be seen as a strong indication of preference for local products. This WTP greatly depends on the characteristics of the households. Wealthier households are willing to pay more than the medium households, while big households are ready to pay much less than the base category ones. Obviously, some niche markets exist, that producers may target to sell the local milk-based dairy products. However, more information has to be provided about the composition of dairy products, as consumers are not currently able to distinguish both types of raw material, even if they are willing to pay more for one of them. In spite of some restrictions about the presence of a potential "hypothetical bias" due to the nature of the data, this study gives a rst insight of consumers' preferences for local milk-based dairy products. [less ▲]

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See detailIdentité et frontière. Les Alamans et les confins de l'Empire romain
Dignef, Anthony ULg

E-print/Working paper (2011)

Detailed reference viewed: 38 (8 ULg)
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See detailA Calibrated Growth Model of Global Imbalances
Artige, Lionel ULg; Cavenaile, Laurent ULg

E-print/Working paper (2011)

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See detailLa matière des mots: Paroles de Dick Annegarn
Demoulin, Laurent ULg

E-print/Working paper (2011)

Comme Dick Annegarn l'indique lui-même, il ne faut pas confondre poésie et texte de chanson. C'est sur cette base qu'il faut lire les textes de Dick Annegarn. Apparaissent alors l'originalité des ... [more ▼]

Comme Dick Annegarn l'indique lui-même, il ne faut pas confondre poésie et texte de chanson. C'est sur cette base qu'il faut lire les textes de Dick Annegarn. Apparaissent alors l'originalité des métaplasmes qui traversent ses "paroles" et la richesse des thèmes qu'il aborde. [less ▲]

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See detailBulletin de la Société Voltaire n°22
Tilkin, Françoise ULg

E-print/Working paper (2011)

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See detailLa construction d'une politique d'agglomération en région wallonne
Boniver, Véronique ULg; Harou, Raphaëlle; SInzot, Anne et al

E-print/Working paper (2011)

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See detailChicago Blues Festival 2010 - compte-rendu
Sacré, Robert ULg

E-print/Working paper (2011)

compte rendu de festival

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See detailAimer un enfant autiste
Demoulin, Laurent ULg

E-print/Working paper (2011)

Présentation de la bande dessinée Maria et moi de Gallardo, intéressante du point de vue du développement de la bande dessinée autobiographique. Maria et moi est en outre un appel à la tolérance et une ... [more ▼]

Présentation de la bande dessinée Maria et moi de Gallardo, intéressante du point de vue du développement de la bande dessinée autobiographique. Maria et moi est en outre un appel à la tolérance et une déclaration d'amour d'un père à son enfant autiste. [less ▲]

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See detailLa coopération brésilienne avec l’Afrique
Santander, Sébastian ULg

E-print/Working paper (2011)

Cet article scientifique se penche sur la stratégie de coopération au développement développée par les puissances émergentes et s'intéresse plus particulièrement aux relations développées par le Brésil ... [more ▼]

Cet article scientifique se penche sur la stratégie de coopération au développement développée par les puissances émergentes et s'intéresse plus particulièrement aux relations développées par le Brésil avec l'Afrique. [less ▲]

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See detailLa marche : le territoire à l’échelle 1/1
Frankignoulle, Pierre ULg

E-print/Working paper (2011)

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See detailLa gouvernance des pôles de compétitivité vue sous le prisme de la fonction de coordination
Lisein, Olivier ULg

E-print/Working paper (2011)

En forte croissance ces dernières années, l’intérêt du milieu académique pour les réseaux d’innovation aborde sous des angles divers les différents enjeux que soulève cette forme de regroupement ... [more ▼]

En forte croissance ces dernières années, l’intérêt du milieu académique pour les réseaux d’innovation aborde sous des angles divers les différents enjeux que soulève cette forme de regroupement d’organisations et de structure partenariale. Dans ce cadre, notre contribution entend plus spécifiquement interroger la question de la gouvernance – et de la coordination des activités qui y sont menées – en vigueur au sein d’une forme particulière de réseaux inter-organisationnels : les pôles de compétitivité. La gouvernance de ce type de réseaux d’innovation réunissant des catégories d’acteurs hétérogènes mus par des intérêts contrastés, les formes qu’elle est concrètement susceptible de prendre dans les faits, les difficultés qu’elle soulève au quotidien ainsi que les dynamiques qu’elle engendre en termes de synergies collaboratives constituent autant de champs de recherche en pleine émergence que nous entendons compléter par l’examen d’une question centrale dans le succès de ce type d’initiatives : les rôles et missions qu’y joue la fonction de coordination. En ce sens, nous questionnons l’importance du rôle de la fonction de coordination dans la gestion des relations entre acteurs, dans la conciliation de leurs intérêts ainsi que dans l’élaboration d’une vision stratégique commune et partagée pour le partenariat. Ce faisant, nous entendons examiner le côté « tercéisant » des initiatives mises en place en la matière, à savoir le processus de réflexivité et de déplacement identitaire qu’insuffle la fonction de coordination au niveau du réseau pour permettre l’institutionnalisation de nouvelles pratiques collaboratives et arriver à la satisfaction conjointe des intérêts respectifs des différents partenaires. Outre un apport analytique basé sur l’examen de trois études de cas, notre réflexion entend également suggérer différentes recommandations quant aux dynamiques de gouvernance à privilégier dans le cadre des projets des pôles de compétitivité et aux tâches effectives de gestion et de coordination à y assurer pour en favoriser le succès. [less ▲]

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See detailLa guerre à Gaza (2009): le conflit israélo-arabe en question
Piet, Grégory ULg; Wintgens, Sophie ULg; Stans, David ULg

E-print/Working paper (2011)

Detailed reference viewed: 20 (2 ULg)
See detailStock markets,banks and long run economic growth: a panel cointegration-based analysis
Cavenaile, Laurent ULg; Gengenbach, Christian; Palm, Franz

E-print/Working paper (2011)

The aim of this paper is to investigate the long run relationship between the development of banks and stock markets and economic growth. We make use of the Groen and Kleibergen (2003) panel cointegration ... [more ▼]

The aim of this paper is to investigate the long run relationship between the development of banks and stock markets and economic growth. We make use of the Groen and Kleibergen (2003) panel cointegration methodology to test the number of cointegrating vectors among these three variables for 5 developing countries. In addition, we test the direction of potential causality between nancial and economic development. Our results conclude to the existence of a single cointegrating vector between nancial development and growth and of causality going from nancial development to economic growth. We nd little evidence of reverse causation as well as bi-directional causality. [less ▲]

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See detailLéon Wuidar ou les hiérophanies ludiques
Housen, Jean ULg

E-print/Working paper (2011)

Présentation de l'oeuvre de Léon Wuidar (sculptures au Musée en plein air du Sart-Tilman).

Detailed reference viewed: 32 (4 ULg)
See detailThriller avec philosophe, revolver et joute verbale
Demoulin, Laurent ULg

E-print/Working paper (2011)

Dans son roman Comme un chien, Daniel Arnaut fait preuve de qualités littéraires diverses et rarement associées entre elles: ce roman est à la fois palpitant et philosophique

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Peer Reviewed
See detailAlcestis Barcinonensis (P. Montserrat 158-161 = MP³ 2998.1). Texto e tradução em língua portuguesa (Brasil)
Macedo, Gabriel ULg

E-print/Working paper (2011)

Édition papyrologie, apparat critique et traduction portugaise du poème latin anonyme.

Detailed reference viewed: 13 (0 ULg)
See detailLe courage de la douceur
Demoulin, Laurent ULg

E-print/Working paper (2011)

Compte rendu consacré au recueil de nouvelles de Carmelo Virone Des nouvelles du jardin.

Detailed reference viewed: 30 (3 ULg)
See detailSavoureuse archéologie de la bande dessinée
Demoulin, Laurent ULg

E-print/Working paper (2011)

La bande dessinée a tendance à oublier les auteurs du passé dont les séries n'ont pas rencontré un grand succès commercial. Jijé semble être l'exception à la règle.

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See detailLe fléau des faux médicaments
Marini Djang'Eing'A, Roland ULg; Ziemons, Eric ULg; Hubert, Philippe ULg

E-print/Working paper (2011)

The traffic in counterfeit medicines is booming. It misleads, and it kills. A University of Liège team is making Rwandan and Congolese health care workers aware of the problem, whilst informing and ... [more ▼]

The traffic in counterfeit medicines is booming. It misleads, and it kills. A University of Liège team is making Rwandan and Congolese health care workers aware of the problem, whilst informing and training them, so that they may detect and monitor these products, thanks to made to measure appropriate technical systems. [less ▲]

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See detailArguments for Engaging Contemporary China
Florence, Eric ULg

E-print/Working paper (2011)

Whether it be the 2008 Olympic games or Shanghai‘s 2010 Universal Expo, for several years now China, a country of more than 1.4 billion habitants, is mentioned almost every day in the news. Not a week ... [more ▼]

Whether it be the 2008 Olympic games or Shanghai‘s 2010 Universal Expo, for several years now China, a country of more than 1.4 billion habitants, is mentioned almost every day in the news. Not a week goes by without hearing about its growth records, its clout in international trade and in raw material consumption, or about the emergence of a middle class, with a consumption level nearing that of the Western world. Far from giving the pretention of proposing a concrete representation of today’s China, what is suggested in this paper are several elements that may shed light on important socio-political processes in contemporary China beyond newsbytes. [less ▲]

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See detailArticulations between commercial banks and microfinance institutions in Sub- Saharan Africa: the case of Cameroon
Teuwa Nkeuwo, Mathieu Hugues ULg; Moulin, Bertrand

E-print/Working paper (2011)

In this article, we evaluate, from the point of view of banks, the potential of articulations between commercial banks and microfinance institutions (MFIs) in Cameroun in terms of financing of the rural ... [more ▼]

In this article, we evaluate, from the point of view of banks, the potential of articulations between commercial banks and microfinance institutions (MFIs) in Cameroun in terms of financing of the rural and the micro, small and medium enterprises (MSMEs). Furthermore, we seek to define the best form of partnership between the two types of institutions. The results obtained suggest that the articulations between banks and MFIs can potentially be beneficial to all stakeholders (banks, MFIs but also recipients). This study also highlights the fact that these articulations can be even more beneficial if national commercial banks, under the Cameroonian law in our case, participate rather than branches of foreign banking groups. Indeed, our research reveals that through these partnerships, from their cultural proximity and their propensity to take more risks, national commercial banks will more likely offer either directly or indirectly (through MFIs) more adapted financial products and services to both the rural and the MSMEs’ segments. The question of knowing if a better form of partnership between commercial banks and MFIs exists, results suggest that there is no better form of partnership as such; that the best form depends on the MFI’s development stage and that in any case this partnership should privilege a national commercial bank rather than a branch of a foreign bank. Even if the foreign banks’ contest might be necessary at a given stage of the process, the results make it also possible to consider a new model of interactions implying Microfinance investment vehicles and national commercial banks. This model would have the advantage to help mitigate risks that those vehicles perceive when deciding to directly invest in MFIs. [less ▲]

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Peer Reviewed
See detailAlcestis Barcinonensis - Texte et traduction française
Macedo, Gabriel ULg

E-print/Working paper (2011)

Detailed reference viewed: 24 (2 ULg)
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See detailLuis Salazar ou la tectonique des plaques
Housen, Jean ULg

E-print/Working paper (2011)

Présentation de l'oeuvre de Luis Salazar, et particulièrement d'une peinture murale au restaurant universitaire du Sart-Tilman.

Detailed reference viewed: 42 (4 ULg)
See detailRisk Taking of Executives under Different Incentive Contracts: Experimental Evidence
Lefebvre, Mathieu ULg; Vieider, Ferdinand

E-print/Working paper (2011)

Classic financial agency theory recommends compensation through stock options rather than shares to induce risk neutrality in otherwise risk averse agents. In an experiment, we find that subjects acting ... [more ▼]

Classic financial agency theory recommends compensation through stock options rather than shares to induce risk neutrality in otherwise risk averse agents. In an experiment, we find that subjects acting as executives do also take risks that are excessive from the perspective of shareholders if compensated through options. Compensation through restricted company stock reduces the uptake of excessive risks. Even under stock-ownership, however, experimental executives continue to take excessive risks—a result that cannot be accounted for by classic incentive theory. We develop a basic model in which such risk-taking behavior is explained based on a richer array of risk attitudes derived from Prospect Theory. We use the model to derive hypotheses on what may be driving excessive risk taking in the experiment. Testing those hypotheses, we find that most of them are indeed borne out by the data. We thus conclude that a prospect-theory-based model is more apt at explaining risk attitudes under different compensation regimes than traditional principal-agent models grounded in expected utility theory. [less ▲]

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See detailTax Evasion, Welfare Fraud, and "The Broken Windows" Effect: An Experiment in Belgium, France and the Netherlands
Lefebvre, Mathieu ULg; Pestieau, Pierre ULg; Riedl, Arno et al

E-print/Working paper (2011)

In a series of experiments conducted in Belgium (Wallonia and Flanders), France and the Netherlands, we compare behavior regarding tax evasion and welfare dodging, with and without information about ... [more ▼]

In a series of experiments conducted in Belgium (Wallonia and Flanders), France and the Netherlands, we compare behavior regarding tax evasion and welfare dodging, with and without information about others’ behavior. Subjects have to decide between a ‘registered’ income, the realization of which will be known to the tax authority for sure, and an ‘unregistered’ income that will only be known with some probability. This unregistered income comes from self-employment in the Tax treatment and from black labor supplementing some unemployment compensation in the Welfare treatment. Subjects have then to decide on whether reporting their income or not, knowing the risk of detection. The results show that (i) individuals evade more in the Welfare treatment than in the Tax treatment; (ii) many subjects choose an option that allows for tax evasion or welfare fraud but report their income honestly anyway; (iii) examples of low compliance tend to increase tax evasion while examples of high compliance exert no influence; (iv) tax evasion is more frequent in France and the Netherlands; Walloons evade taxes less than the Flemish. There is no cross-country difference in welfare dodging. [less ▲]

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See detailTumeurs de l'hypophyse : la chasse aux gènes est ouverte !
Beckers, Albert ULg

E-print/Working paper (2011)

Detailed reference viewed: 15 (5 ULg)
See detailHet begin van de boekdrukkunst in België
Adam, Renaud ULg

E-print/Working paper (2011)

Detailed reference viewed: 6 (0 ULg)
See detailLe début de l’imprimerie en Belgique
Adam, Renaud ULg

E-print/Working paper (2011)

Detailed reference viewed: 4 (0 ULg)
See detailEstimation of the error density in a semi-parametric transformation model.
Samb, Rawane; Heuchenne, Cédric ULg; Van Keilegom, Ingrid

E-print/Working paper (2011)

Detailed reference viewed: 16 (0 ULg)
See detailLikelihood based inference for semi-competing risks
Heuchenne, Cédric ULg; Legrand, Catherine; Laurent, Stéphane ULg et al

E-print/Working paper (2011)

Detailed reference viewed: 32 (4 ULg)