References of "Perelman, Sergio"
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See detailL’âge de la retraite affecte-t-il le fonctionnement cognitif de la personne âgée?
Adam, Stéphane ULg; Bonsang, Eric; Perelman, Sergio ULg

Conference (2010, September 23)

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See detailDoes Retirement Affect Cognitive Functioning?
Bonsang, Eric; Adam, Stéphane ULg; Perelman, Sergio ULg

Conference (2010, July 16)

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See detailThe effects of early retirement on youth unemployment: the case of Belgium
Jousten, Alain ULg; Lefebvre, Mathieu ULg; Pestieau, Pierre ULg et al

in Gruber, Jonathan; Wise, David (Eds.) Social Security Programs and Retirement around the World: The Relationship to Youth Employment (2010)

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See detailL'âge du départ à la retraite comme question de politique de santé publique?
Adam, Stéphane ULg; Bonsang, Eric; Perelman, Sergio ULg

in La Sève (2010), 1

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See detailDoes Retirement Affect Cognitive Functioning?
Bonsang, Eric; Adam, Stéphane ULg; Perelman, Sergio ULg

Report (2010)

This paper analyzes the effect of retirement on cognitive functioning using two large scale surveys. On the one hand the HRS, a longitudinal survey among individuals aged 50+ living in the United States ... [more ▼]

This paper analyzes the effect of retirement on cognitive functioning using two large scale surveys. On the one hand the HRS, a longitudinal survey among individuals aged 50+ living in the United States, allows us to control for individual heterogeneity and endogeneity of the retirement decision by using the eligibility age for Social Security as an instrument. On the other hand, a comparable international European survey, SHARE, allows us to identify the causal effect of retirement on cognitive functioning by using the cross-country differences in the age-pattern of retirement. The results highlight in both cases a significant negative, and quantitatively comparable, effect of retirement on cognitive functioning. Our results suggest that promoting labor force participation of older workers is not only desirable to insure the viability of retirement schemes, but it could also delay cognitive decline, and thus the occurrence of associated impairments at older age. [less ▲]

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See detailDisability in Belgium: There is More than Meets the Eye
Jousten, Alain ULg; Perelman, Sergio ULg; Lefebvre, Mathieu ULg

Report (2010)

The paper provides a perspective on the development of the Belgian disability insurance system. Using both survey and administrative data, it sketches a picture of the (changing) factors leading towards ... [more ▼]

The paper provides a perspective on the development of the Belgian disability insurance system. Using both survey and administrative data, it sketches a picture of the (changing) factors leading towards disability, as well as the outcomes in terms of program participation. The paper shows the key role of integrating other forms of early retirement programs into the analysis. The main findings are an unspectacular trend in the number of DI beneficiaries over time combined with a strong expansion of (early-) retirement schemes. [less ▲]

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See detailTracking the stepwise effects of regulatory reforms over time: a "back-door" approach
González, Maria Manuella; Perelman, Sergio ULg; Trujillo, Lourdes

in Applied Economics (2009), 41(2), 211-218

Most of the literature on the efficiency effects of regulatory reforms ignores the gradual nature of the implementation of these reforms. This article describes a new simple data manipulation that ... [more ▼]

Most of the literature on the efficiency effects of regulatory reforms ignores the gradual nature of the implementation of these reforms. This article describes a new simple data manipulation that minimizes data requirements to measure econometrically the impact on efficiency of each stage of multi-stages regulatory reforms. The approach can easily be implemented using standard stochastic frontier software programs. It is illustrated with data on the Spanish port system, which went through a two-stage reform during the 1990s. [less ▲]

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See detailBelgian Social Protection Portrait
Atta, C.; Pestieau, Pierre ULg; Perelman, Sergio ULg

Report (2009)

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See detailHow to generate regularly behaved production data? A Monte Carlo experimentation on DEA scale efficiency measurement
Santin, Daniel; Perelman, Sergio ULg

in European Journal of Operational Research (2009), (199), 303-310

Monte Carlo experimentation is a well-known approach used to test the performance of alternative methodologies under different hypotheses. In the frontier analysis framework, whatever the parametric or ... [more ▼]

Monte Carlo experimentation is a well-known approach used to test the performance of alternative methodologies under different hypotheses. In the frontier analysis framework, whatever the parametric or non-parametric methods tested, experiments to date have been developed assuming single output multi-input production functions. The data generated have mostly assumed a Cobb–Douglas technology. Among other drawbacks, this simple framework does not allow the evaluation of DEA performance on scale efficiency measurement. The aim of this paper is twofold. On the one hand, we show how reliable two-output two-input production data can be generated using a parametric output distance function approach. A variable returns to scale translog technology satisfying regularity conditions is used for this purpose. On the other hand, we evaluate the accuracy of DEA technical and scale efficiency measurement when sample size and output ratios vary. Our Monte Carlo experiment shows that the correlation between true and estimated scale efficiency is dramatically low when DEA analysis is performed with small samples and wide output ratio variations. [less ▲]

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See detailLes indicateurs d'inclusion sociale. Où est la Wallonie aujourd'hui?
Atta, Cécile; Maréchal, Claire; Perelman, Sergio ULg

in Thys, F.; Dejardin, M. (Eds.) Wallonie et Bruxelles: analyses et enjeux (2009)

We use the primary indicators of social inclusion proposed within the scope of the Open Method of Coordination (OMC) to situate Wallonia in the European Union (EU15) context. The results show that ... [more ▼]

We use the primary indicators of social inclusion proposed within the scope of the Open Method of Coordination (OMC) to situate Wallonia in the European Union (EU15) context. The results show that Wallonia stood in 2005 at the same level as Greece and was behind the EU15 level mainly regarding poverty and long-term unemployment rates. Groups at risk are single-parent families as well as unemployed and other inactive categories. Having at disposal these indicators for the years to come will be a must not only for the design but also for the evaluation of policies towards a better social cohesion. [less ▲]

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See detailValorisation of Microsimulation Model for Social Security Mimosis
Decoster, André; Maréchal, Claire; Paszukiewicz, Alexis ULg et al

Report (2008)

This report is part of the output of the project AG/01/116. The main objectives of project AG/01/116 were to further refine and validate the microsimulation model for social security, MIMOSIS, both by ... [more ▼]

This report is part of the output of the project AG/01/116. The main objectives of project AG/01/116 were to further refine and validate the microsimulation model for social security, MIMOSIS, both by extending the data coverage and refining the modules as through a comparative study of how MIMOSIS is positioned in an international perspective and also by use of MIMOSIS for evaluation of (hypothetical) policy reforms. [less ▲]

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See detailUn indicateur de l'étendue et de l'évolution du travail au noir en Belgique
Pacolet, J.; Pestieau, Pierre ULg; Baeyens, K. et al

in Revue Belge de Sécurité Sociale (2008), (4), 437-462

Although the methods for measuring the extent of undeclared work are improving continuously, they still have shortcomings today. The statistical apparatus is not adapted to the present-day needs for ... [more ▼]

Although the methods for measuring the extent of undeclared work are improving continuously, they still have shortcomings today. The statistical apparatus is not adapted to the present-day needs for mapping this phenomenon. The assignment is not simple either: making something visible that wants to remain hidden by definition. This article summarises a study that was conducted on behalf of the Belgian Science Policy and the Federal Public Service Employment, Labour and Social Dialogue in order to examine the possibilities to improve methods for measuring the extent of undeclared work in Belgium. The study revealed that eventually, a multitude of methods will have to be used. The bad image our country has because it accepts the most divergent estimates, can be turned into an advantage by taking the lead in conciliating and combining this multitude of methods. [less ▲]

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See detailCAP Reforms and Total Factor Productivity Growth: An Analysis of Belgian Farm-level Data
Coelli, Tim; Van Lierde, Dirk; Perelman, Sergio ULg

Report (2008)

Have the 1992 and 2000 CAP reforms had any discernable effect upon agricultural productivity? In this study we derive detailed information on the total factor productivity (TFP) growth of arable farms in ... [more ▼]

Have the 1992 and 2000 CAP reforms had any discernable effect upon agricultural productivity? In this study we derive detailed information on the total factor productivity (TFP) growth of arable farms in Belgium over a 16-year period from 1987 to 2002. Calculations are based on a carefully constructed high-quality detailed farm-level data set containing 1728 observations, involving over 100 farms in most years. Three output variables (cereals, other crops, other outputs) and four input variables (land, labour, capital and other inputs) are constructed, using multilateral Fisher index numbers where crop aggregation is required. The TFP measures are calculated using a Malmquist TFP index relative to a series of data envelopment analysis (DEA) frontiers. Annual average TFP change of 1.0% per year is estimated for this industry. This rate does not compare well with rates of over 2% that are commonly reported in studies involving other developed countries. The pattern of TFP growth over the period indicates that the two CAP reforms (in 1992 and 2000) have had no discernable effect upon TFP trends. An inspection of shadow shares (derived from the DEA frontiers) indicates that substantial distortions remain in this industry, especially with regards to the excess use of labour and constrained use of land, relative to other inputs. Finally, tabulation of results by region and farm size shows fairly uniform TFP change across regions, but poor performance in small farms, where TFP actually levels actually fell over this period. [less ▲]

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See detailImposing monotonicity in parametric distance functions
Santin, D.; Perelman, Sergio ULg

in Applied Economics (2008)

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See detailIncorporating quality of service in a benchmarking model:an application to French electricity distribution operators
Coelli, Tim; Crespo, Hélène; Plagnet, Marie-Anne et al

Report (2007)

In this paper we use annual data on 92 French electricity distribution units (2003-2005) to estimate a benchmarking model that includes a quality of service indicator (number of interruptions). Our ... [more ▼]

In this paper we use annual data on 92 French electricity distribution units (2003-2005) to estimate a benchmarking model that includes a quality of service indicator (number of interruptions). Our methodology involves the estimation of input distance functions using stochastic frontier analysis (SFA) and data envelopment analysis (DEA) techniques. The empirical results indicate that the inclusion of the quality variable has no significant effect upon mean technical efficiency scores, and the mean shadow price of one interruption is approximately ten Euros. The analysis in this paper is the first preliminary step in a larger project which is investigating the feasibility of including quality measures into benchmarking models that are often used by regulatory authorities [less ▲]

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See detailMicro-simulation of Social Security reforms in Belgium
Jousten, Alain ULg; Desmet, R.; Perelman, Sergio ULg et al

in Gruber, J.; Wise, D. (Eds.) Social Security Programs and Retirement around the World: Fiscal Implications of Reform (2007)

The present paper analyzes the budgetary impact of various Social Security reforms in the Belgian institutional setting. Our approach relies on parameters that were derived in Dellis et alii (2002) using ... [more ▼]

The present paper analyzes the budgetary impact of various Social Security reforms in the Belgian institutional setting. Our approach relies on parameters that were derived in Dellis et alii (2002) using a micro-modeling strategy. Focusing our attention on a hypothetical age cohort, we illustrate the budgetary impact that the reforms considered might have on the budget of the federal government. [less ▲]

Detailed reference viewed: 55 (18 ULg)