Testing for Selectivity Bias in Panel Data Models

Marno Verbeek and Theo Nijman

International Economic Review, 1992, vol. 33, issue 3, 681-703

Abstract: The authors discuss several tests to check for the presence of selectivity bias in estimators based on panel data. One approach to test for selectivity bias is to specify the selection mechanism explicitly and estimate it jointly with the model of interest. Alternatively, one can derive the asymptotically efficient Lagrange multiplier test. Both approaches are computationally demanding. In this paper, the authors propose the use of simple variable addition and (quasi-) Hausman tests for selectivity bias that do not require any knowledge of the response process. They compare the power of these tests with the asymptotically efficient test using Monte Carlo methods. Copyright 1992 by Economics Department of the University of Pennsylvania and the Osaka University Institute of Social and Economic Research Association.

Date: 1992
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Related works:
Working Paper: TESTING FOR SELECTIVITY BIAS IN PANEL DATA MODELS (1990)
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