Title

Identification of a Heterogeneous Generalized Regression Model with Group Effects

Document Type

Discussion Paper

Publication Date

10-1-2009

CFDP Number

1732

CFDP Pages

20

Abstract

We consider identification in a “generalized regression model” (Han, 1987) for panel settings in which each observation can be associated with a “group” whose members are subject to a common unobserved shock. Common examples of groups include markets, schools or cities. The model is fully nonparametric and allows for the endogeneity of group-specific observables, which might include prices, policies, and/or treatments. The model features heterogeneous responses to observables and unobservables, and arbitrary heteroskedasticity. We provide sufficient conditions for full identification of the model, as well as weaker conditions sufficient for identification of the latent group effects and the distribution of outcomes conditional on covariates and the group effect.

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