Biørn, Erik - Økonomisk institutt, Universitetet i Oslo - 2012
The Generalized Method of Moments (GMM) is discussed for handling the joint occurrence of fixed effects and random … is assumed. Two specializations of GMM are considered: (i) using instruments (IVs) in levels for a differenced version of … sample biases and IV quality are illustrated by Monte Carlo simulations. Overall, with respect to bias and IV strength, GMM …