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Testing inference in heteroskedastic fixed effects models

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  • Uchôa, Carlos F.A.
  • Cribari-Neto, Francisco
  • Menezes, Tatiane A.

Abstract

This paper considers the issue of performing testing inference in fixed effects panel data models under heteroskedasticity of unknown form. We use numerical integration to compute the exact null distributions of different quasi-t test statistics and compare them to their limiting counterpart. The test statistics use different heteroskedasticity-consistent standard errors. Our results reveal that the asymptotic approximation is usually poor in small samples when the test statistic is based on the covariance matrix estimator proposed by Arellano (1987). The quality of the approximation is greatly increased when the standard error is obtained using other heteroskedasticity-consistent estimators, most notably the CHC4 estimator. Our results also reveal that the performance of Arellano’s test improves considerably when standard errors are computed using restricted residuals.

Suggested Citation

  • Uchôa, Carlos F.A. & Cribari-Neto, Francisco & Menezes, Tatiane A., 2014. "Testing inference in heteroskedastic fixed effects models," European Journal of Operational Research, Elsevier, vol. 235(3), pages 660-670.
    • Handle: RePEc:eee:ejores:v:235:y:2014:i:3:p:660-670
    DOI: 10.1016/j.ejor.2014.01.032
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    References listed on IDEAS

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