TY  - JOUR
A1  - Cragg, J.G.
A1  - Donald, S.G.
T1  - Testing identifiability and specification in instrumental variables models
Y1  - 1993
DO  - 10.1017/S0266466600007519
JF  - Econometric Theory
VL  - 9
IS  - 2
SP  - 222
EP  - -240

ER  -