James J. Heckman (EDT)/ Edward E. Leamer (EDT)
(3)
James J. Heckman (EDT)/ John Eric Humphries (EDT)/ Tim Kautz (EDT)
(2)
James J. Heckman (EDT)/ Robert L. Nelson (EDT)/ Lee Cabatingan (EDT)
(2)
James J. Heckman, Alan B. Krueger, Benjamin M. Friedman
(1)
Matthew J. Morgan (EDT)/ James J. Heckman (FRW)
(1)
Steven Durlauf (EDT)/ Lars Peter Hansen (EDT)/ James J. Heckman (EDT)/ Rosa Liliana Matzkin (EDT)
(1)