TY  - JOUR
TI  - Panel Data and Unobservable Individual Effects
AU  - Jerry A. Hausman
AU  - William E. Taylor
JO  - Econometrica
PY  - 1981
VL  - 49
IS  - 6
DO  - 10.2307/1911406
UR  - https://doi.org/10.2307/1911406
ER  -