Maximum Likelihood and GMM Estimation of Dynamic Panel Data Models with Fixed Effects
Quuen Mary & Westfield Economics Working Paper No. 429
66 Pages Posted: 3 Feb 2001
Date Written: December 2000
Abstract
This paper considers inference procedures for two types of dynamic linear panel data models with fixed effects (FE). First, it shows that the closures of stationary ARMAFE models can be consistently estimated by Conditional Maximum Likelihood Estimators and it derives their asymptotic distributions. Then it presents an asymptotically equivalent Minimum Distance Estimator which permits an analytic comparison between the CMLE for the ARFE (1) model and the GMM estimators that have been considered in the literature. The CMLE is shown to be asymptotically less efficient than the most efficient GMM estimator when N approaches the limit infinity but T is fixed. Under normality some of the moment conditions become asymptotically redundant and the CMLE attains the Cramer-Rao lowerbound when T approaches the limit infinity as well. The paper also presents likelihood based unit root tests. Finally, the properties of CML, GMM, and Modified ML estimators for dynamic panel data models that condition on the initial observations are studied and compared. It is shown that for finite T the MMLE is less efficient than the most efficient GMM estimator.
Keywords: dynamic panel data models, fixed effects, GMM, Conditional ML, Modified ML, Bayesian methods, (asymptotic) redundancy, Cramer-Rao and semiparametric efficiency bounds, unit root tests, parameter on boundary problem
JEL Classification: C11, C14, C23
Suggested Citation: Suggested Citation
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