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Efficiency of two-step estimators for censored systems of equations: Shonkwiler and Yen reconsidered

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This study analyses a parametric estimator for a system of equations with limited dependent variables that was recently proposed. Its performance is compared with those of alternative estimation procedures using Monte Carlo methods. The comparison shows that this new estimator is less efficient for a wide range of parameter regions than multivariate generalizations of the classical Heckman model. This result can be explained by its variance depending on the squared conditional mean of the dependent variables. Additionally, it turns out that within the class of generalized Heckman estimators, rather simple ones display the best performance.
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Document Type: Research Article

Affiliations: Rheinisch-Westfälisches Institut für Wirtschaftsforschung (RWI Essen) Hohenzollernstr 1-3, D-45128 Essen Germany, Email: [email protected]

Publication date: 2005-03-01

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