Record number :
1556500
Title of article :
Another look at the instrumental variable estimation of error-components models
Author/Authors :
Arellano، نويسنده , , Manuel and Bover، نويسنده , , Olympia، نويسنده ,
Issue Information :
دوفصلنامه با شماره پیاپی سال 1995
Pages :
23
From page :
29
To page :
51
Abstract :
This article develops a framework for efficient IV estimators of random effects models with information in levels which can accommodate predetermined variables. Our formulation clarifies the relationship between the existing estimators and the role of transformations in panel data models. We characterize the valid transformations for relevant models and show that optimal estimators are invariant to the transformation used to remove individual effects. We present an alternative transformation for models with predetermined instruments which preserves the orthogonality among the errors. Finally, we consider models with predetermined variables that have constant correlation with the effects and illustrate their importance with simulations.
Keywords :
Unrestricted covariance matrix , Unit roots , Dynamic panel data , Predetermined instrumental variables , Orthogonal deviations
Journal title :
Journal of Econometrics
Serial Year :
1995
Link To Document :
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