The Robustness Of Estimators For Dynamic Panel Data Models To Misspecification
AbstractTransition from economic theory to a testable form of model invariably involves the use of certain "simplifying assumptions." If, however, these are not valid, misspecified models result. This article considers estimation of the dynamic linear panel data model, which often forms the basis of testable economic hypotheses. The estimators of such a model are frequently similarly based on certain assumptions which appear to be often untenable in practice. Here, the performance of these estimators is analyzed in scenarios where the theoretically required conditions are not met. Specifically, we consider three such instances of serial correlation of the idiosyncratic disturbance terms; correlation of the idiosyncratic disturbance terms and explanatory variables; and, finally, cross-sectional dependence (as a robustness check to these findings, we also consider correlations between observed and unobserved heterogeneity terms). The major findings are that the limited tests readily available tend to have poor power properties and that estimators' performance varies greatly across scenarios. In such a wide array of experiments, it is difficult to pick-out just one "winner." However, a robust estimator across all experiments and parameter settings was a variant of the Wansbeek–Bekker estimator. This is a significant finding, as this estimator is infrequently used in practice. When the experiments are extended to include correlations between observed and unobserved heterogeneity terms, one might also consider, for across-the-board performance, the Blundell and Bond estimator.
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Bibliographic InfoArticle provided by World Scientific Publishing Co. Pte. Ltd. in its journal The Singapore Economic Review.
Volume (Year): 54 (2009)
Issue (Month): 03 ()
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Other versions of this item:
- Harris, M.N. & Longmire, R.J. & Matyas, L., 1996. "The Robustness of Estimators for Dynamic Panel Data Models to Misspecification," Monash Econometrics and Business Statistics Working Papers 9/96, Monash University, Department of Econometrics and Business Statistics.
- C13 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Estimation: General
- C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Statistical Simulation Methods: General
- C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Longitudinal Data; Spatial Time Series
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- Simon Feeny & Mark N. Harris & Joanne Loundes, 2000.
"A Dynamic Panel Analysis of the Profitability of Australian Tax Entities,"
Melbourne Institute Working Paper Series
wp2000n22, Melbourne Institute of Applied Economic and Social Research, The University of Melbourne.
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- Mark Harris & Simon Feeny, 2003. "Habit persistence in effective tax rates," Applied Economics, Taylor & Francis Journals, vol. 35(8), pages 951-958.
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