Heckman, James Joseph
Instrumental variables: a cautionary tale .-- Cambridge (Mass.) : National Bureau of Economic Research , 1995
.--v., graf. 22 cm. .-- ( NBER. Technical Working Papers; 185 ).
Conclusiones.-Bibliografía
VARIABLES ESTADISTICAS
Instrumental variables: a cautionary tale .-- Cambridge (Mass.) : National Bureau of Economic Research , 1995
.--v., graf. 22 cm. .-- ( NBER. Technical Working Papers; 185 ).
Conclusiones.-Bibliografía
VARIABLES ESTADISTICAS