TY  - BOOK
AU  - Heckman,James J.
AU  - Leamer,Edward E.
TI  - Handbook of econometrics
SN  - 9780444506313 (vol. 6A)
PY  - 2007///
CY  - Amsterdam
PB  - Elsevier
KW  - Econometrics
N1  - Vol. 6A & 6B, editors : James J. Heckman and Edward Leamer
ER  -