TY  - JOUR
TI  - Instrumental Variables and GMM: Estimation and Testing
AU  - Christopher F. Baum
AU  - Mark E. Schaffer
AU  - Steven Stillman
JO  - The Stata Journal Promoting communications on statistics and Stata
PY  - 2003
VL  - 3
IS  - 1
DO  - 10.1177/1536867x0300300101
UR  - https://doi.org/10.1177/1536867x0300300101
ER  -