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A Flexible Sample Selection Model: A GTL-Copula Approach

Takuya Hasebe and Wim Vijverberg

No 7003, IZA Discussion Papers from Institute of Labor Economics (IZA)

Abstract: In this paper, we propose a new approach to estimating sample selection models that combines Generalized Tukey Lambda (GTL) distributions with copulas. The GTL distribution is a versatile univariate distribution that permits a wide range of skewness and thick- or thin-tailed behavior in the data that it represents. Copulas help create versatile representations of bivariate distribution. The versatility arising from inserting GTL marginal distributions into copula-constructed bivariate distributions reduces the dependence of estimated parameters on distributional assumptions in applied research. A thorough Monte Carlo study illustrates that our proposed estimator performs well under normal and nonnormal settings, both with and without an instrument in the selection equation that fulfills the exclusion restriction that is often considered to be a requisite for implementation of sample selection models in empirical research. Five applications ranging from wages and health expenditures to speeding tickets and international disputes illustrate the value of the proposed GTL-copula estimator.

Keywords: sample selection; copula; Generalized Tukey Lambda distribution (search for similar items in EconPapers)
JEL-codes: C24 C35 (search for similar items in EconPapers)
Pages: 63 pages
Date: 2012-11
New Economics Papers: this item is included in nep-ecm
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Citations: View citations in EconPapers (6) Track citations by RSS feed

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