Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/58438
Authors: 
Nizalova, Olena Y.
Murtazashvili, Irina
Year of Publication: 
2012
Series/Report no.: 
Discussion Paper series, Forschungsinstitut zur Zukunft der Arbeit 6282
Abstract: 
Whether interested in the differential impact of a particular factor in various institutional settings or in the heterogeneous effect of policy or random experiment, the empirical researcher confronts a problem if the factor of interest is correlated with an omitted variable. This paper considers circumstances under which the estimate of the mentioned effect is consistent. We find that if the source of heterogeneity and omitted variable are jointly independent of policy or treatment, then the OLS estimate on the interaction term between the treatment and endogenous factor turns out to be consistent.
Subjects: 
treatment effect
heterogeneity
policy evaluation
random experiments
omitted variable bias
JEL: 
C21
C93
Persistent Identifier of the first edition: 
Document Type: 
Working Paper

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