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A test for endogeneity in conditional quantile models

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Author Info

  • Tae-Hwan Kim

    (School of Economics, Yonsei University)

  • Christophe Muller

    (DEFI, University of Aix-Marseille)

Abstract

In this paper we develop a test to detect the presence of endogeneity in conditional quantile models. The proposed test is a Hausman-type test in that it is based on the distance between two estimators in which one is consistent only under no endogeneity while the other estimator is consistent regardless of the presence of endogeneity in conditional quantile models. We derive the asymptotic distribution of the test statistic under the null hypothesis of no endogeneity. The finite sample properties of the test is investigated by Monte Carlo simulations and it is found that the test shows reasonably good size and power properties in finite samples. Finally, we apply our approach to test for endogeneity in a conditional quantile model for estimating Engel curves using the UK consumption and expenditure data. It is revealed that the pattern of endogeneity found in the Engel curve varies across different quantiles.

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File URL: ftp://repec.yonsei.ac.kr/repec/yon/wpaper/2012rwp-49.pdf
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Bibliographic Info

Paper provided by Yonsei University, Yonsei Economics Research Institute in its series Working papers with number 2012rwp-49.

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Length: 19 pages
Date of creation: May 2012
Date of revision:
Handle: RePEc:yon:wpaper:2012rwp-49

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Related research

Keywords: regression quantile; endogeneity; two-stage estimation; Hausman test; Engel curve;

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