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Autor:innen: 
Erscheinungsjahr: 
2012
Schriftenreihe/Nr.: 
Memorandum No. 02/2012
Verlag: 
University of Oslo, Department of Economics, Oslo
Zusammenfassung: 
The Generalized Method of Moments (GMM) is discussed for handling the joint occurrence of fixed effects and random measurement errors in an autoregressive panel data model. Finite memory of disturbances, latent regressors and measurement errors is assumed. Two specializations of GMM are considered: (i) using instruments (IVs) in levels for a differenced version of the equation, (ii) using IVs in differences for an equation in levels. Index sets for lags and lags are convenient in examining how the potential IV set, satisfying orthogonality and rank conditions, changes when the memory pattern changes. The joint occurrence of measurement errors with long memory may sometimes give an IV-set too small to make estimation possible. On the other hand, problems of 'IV proliferation' and 'weak IVs' may arise unless the time-series length is small. An application based on data for (log-transformed) capital stock and output from Norwegian manufacturing firms is discussed. Finite sample biases and IV quality are illustrated by Monte Carlo simulations. Overall, with respect to bias and IV strength, GMM inference using the level version of the equation seems superior to inference based on the equation in differences.
Schlagwörter: 
Panel data
Measurement error
Dynamic modeling
ARMA model
GMM
Monte Carlo simulation
JEL: 
C21
C23
C31
C33
C51
E21
Dokumentart: 
Working Paper

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