TY  - JOUR
TI  - Determining the Number of Factors in Approximate Factor Models
AU  - Jushan Bai
AU  - Serena Ng
JO  - Econometrica
PY  - 2002
VL  - 70
IS  - 1
DO  - 10.1111/1468-0262.00273
UR  - https://doi.org/10.1111/1468-0262.00273
ER  -