E, Ana Maria DIAZ - Institut de Recherche Économique et Sociale (IRES), … - 2009
: standard OLS estimation, propensity-score matching, and instrumental variables. Results suggest that much of the positive … estimation, propensity-score matching,
and instrumental variables. Results suggest that much of the positive
e ect of using …, Instrumental Variables, Roy Model.
JEL Classi cation: J21, J24, J31, J64, O17, C14, C14.
Date: August 11, 2009.
I am especially …