Title

Maximum Likelihood Estimation in Panels with Incidental Trends

Document Type

Discussion Paper

Publication Date

12-1-1999

CFDP Number

1246

CFDP Pages

30

Abstract

It is shown that the maximum likelihood estimator of a local to unity parameter can be consistently estimated with panel data when the cross section observations are independent. Consistency applies when there are no deterministic trends or when there is a homogeneous deterministic trend in the panel model. When there are heterogeneous deterministic trends the panel MLE of the local to unity parameter is inconsistent. This outcome provides a new instance of inconsistent ML estimation in dynamic panels, and, unlike earlier results of this type, applies when both T approaches infinity and N approaches infinity.

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