Heckman, James J. (contributor); Urzua, Sergio (contributor) - 2006
:
James J. Heckman
Department of Economics
University of Chicago
1126 East 59th Street
Chicago, IL 60637
USA
E-mail: j … treatment effect of the policy. It may vary among countries. We observe characteristics X of
various countries (e.g. level of … democracy, level of population literacy, etc.). It is convenient to
decompose Y
1
into its mean given X, μ
1
(X), and deviation …