TY -
GEN
AU - Heckman, James J.
AU - National Bureau of Economic Research
TI -
Dummy Endogenous Variables in a Simultaneous Equation System
PB - National Bureau of Economic Research
PY - May 1977
BT - NBER working paper series ; no. w0177
CY - Cambridge, Mass
UR - http://slubdd.de/katalog?TN_libero_mab2
ER -