Heckman, James J. (contributor); Urzua, Sergio (contributor) - 2008
competitive research in all fields of labor economics, (ii) development of
policy concepts, and (iii) dissemination of research …
Corresponding author:
James J. Heckman
Department of Economics
University of Chicago
1126 East 59th Street
Chicago, IL 60637 … cation conditions for the full multinomial selection
model developed in Heckman and Vytlacil (2007) .
Dept. of Economics …