Date :  07.12.98 (jj.mm.aa)

Léopold Simar

Professor of Statistics and Chairman of the Institute of Statistics

Address

c/o Institut de Statistique, UCL

Voie du Roman Pays 20

B1348 Louvain-la-Neuve, Belgium

telephone (office): +32-10-474308

electronic mail: <simar@stat.ucl.ac.be>

Current affiliations

• Institut de Statistique, Université Catholique de Louvain
• CORE (Center for Operations Research and Econometrics), Université Catholique de Louvain, Voie du Roman Pays 34, B1348 Louvain-la-Neuve, Belgique
• Facultés Universitaires Saint-Louis, Boulevard du Jardin Botanique 43, 1000 Bruxelles, Belgique

Interest

• mathematical statistics, multivariate statistics and data analysis, semi- and non-parametric statistics, bootstrap and resampling techniques
• econometrics, frontier estimation and estimation of boundaries of a density

Recent Discussion Papers and Publications

• Simar, L. (1992), "Estimating Efficiencies from Frontier Models with Panel Data : a Comparison of Parametric, Non-parametric and Semi-Parametric Methods with Bootstrapping", Journal of Productivity Analysis, 3, 167-203.
• Härdle, W. and L. Simar, (1993), Eds., Computer Intensive Methods in Statistics, Proceedings of the 12th Franco-Belgian Meeting of Statisticians, in Statistics and Computing, vol 1, Physica Verlag.
• Hall, P., Härdle, W. and L. Simar (1993), "On the Inconsistency of Bootstrap Distribution Estimators", Computational Statistics and Data Analysis, 16, 11-18.
• Park, B., Sickles R.C. and L. Simar (1993), "Stochastic Frontiers : A Semiparametric Approach" Discussion paper 9303, Institut de Statistique, UCL.
• Ritter, C. and L. Simar (1994) : "Another look at the American electrical utility data, and corection of results of Greene (1990)", Discussion paper 9401, Institut de Statistique, UCL and CORE Discussion paper, UCL.
• Simar, L., C.A. Knox Lovell and Ph. Vanden Eeckaut (1994) : "Stochastic frontiers incorporating exogenous influences on efficiency", Discussion paper 9403, Institut de Statistique, UCL and CORE Discussion paper, UCL.
• Park, B. and L. Simar (1994), "Efficient Semiparametric Estimation in Stochastic Frontier Model", Journal of the American Statistical Association., vol 89, 427, p929-936.
• Rolin, J.M. and L. Simar (1995), Discussion on "Testing for Mixtures : A Bayesian Entropic Approach" by Mengersen, K.L. and Ch. Robert, in Bayesian Statistics V, Proceedings of the 5th International Meeting on Bayesian Statistics, Valencia.
• Korostelev, A., Simar, L. and A. Tsybakov (1995), "Efficient Estimation of Monotone Boundaries", The Annals of Statistics, 23(2), 476-489.
• Hall, P., Härdle, W. and L. Simar (1995), "Iterated Bootstrap with Application to Frontier Models", The Journal of Productivity Analysis, 6, p63-76.
• Korostelev, A., Simar, L. and A. Tsybakov (1995) : "On Estimation of Monotone and Convex Boundaries", Publications de l'Inst. Stat. Univ. Paris , 1, 3-18.
• Wilson, P. and L. Simar (1995) : "Bootstrap Estimation for Nonparametric Efficiency Estimates", Discussion paper 9517, Institut de Statistique, UCL and CORE, UCL.
• Simar, L. (1996) : "Aspects of Statistical Analysis in DEA-type Frontier Models", The Journal of Productivity Analysis, 7, p 177-185.
• Kneip, A. and L. Simar (1996): "A General framework for Frontier Estimation with Panel data", The Journal of Productivity Analysis, 7, p 187-212.
• Simar, L. and P. Wilson (1996) : "Estimating and Bootstrapping Malmquist Indices", Discussion paper 9613. Institut de Statistique, UCL and CORE, UCL, forthcoming in the European Journal of Operational Research.
• Gijbels, I., E. Mammen, B.U. Park and L. Simar (1996) : "On Estimation of Monotone and Concave Frontier Functions", Discussion paper 9611, Institut de Statistique, UCL, forthcoming in Journal of the American Statistical Association.
• Simar, L. and P. Wilson (1997) : "Some Problems with the Ferrier/Hirschberg Bootstrap Idea", Discussion paper 9712, Institut de Statistique, UCL, forthcoming in The Journal of Productivity Analysis.
• Ritter, C. and L. Simar (1997) : "Pitfalls of normal-gamma stochastic frontier models", The Journal of Productivity Analysis, 8, 167-182.
• Park, B. Simar, L. and Ch. Weiner (1997) : "FDH efficiency scores from a stochastic point of view", Discussion paper 9715, Institut de Statistique, UCL, under revision for Econometric Theory.
• Simar, L. and P. Wilson (1998) : "Sensitivity of efficiency scores : How to bootstrap in Nonparametric frontier models", Management Sciences, 44, 1, 49-61.
• Park, B., Sickles R.C. and L. Simar (1998), "Stochastic Panel Frontiers : A Semiparametric Approach", Journal of Econometrics, 84, 273-301.
• Kneip, A., B. Park and L. Simar (1998) : "A Note on the Convergence of Nonparametric DEA Estimators for Production Efficiency Scores", Econometric Theory, 14, 783-793.
• Simar L. and P. Wilson (1998) : "Productivity Growth in Industrialized Countries", Discussion paper 9810, Institut de Statistique, UCL and CORE, UCL, submitted to American Economic Review.
• Simar L. and P. Wilson (1998) : "A General Methodology for Bootstrapping in Nonparametric Frontier Models", Discussion paper 9811, Institut de Statistique, UCL and CORE, UCL, submitted to Journal of Applied Statistics.
• Simar L. and P. Wilson (1998) : "Nonparametric Test of Return to Scale", Discussion paper 9814, Institut de Statistique, UCL and CORE, UCL, submitted to Journal of Statistical Computations and Simulation.
• Simar L. (1998) : "Le Paradigme Bayésien", à paraître dans Méthodes Bayésiennes en Statistique, J.J. Droesbeke, J. Fine, G. Saporta, eds., Edition Technip, Paris.
• Simar L. (1998) : "Les Modèles de Base de l'Analyse Bayésienne", à paraître dans Méthodes Bayésiennes en Statistique, J.J. Droesbeke, J. Fine, G. Saporta, eds., Edition Technip, Paris.