Variable | Sample | Treated | Controls | Difference | S.E. | T-stat |
IPATENT | Unmatched | 1.7853 | 1.4427 | 0.3425 | 0.0309 | 11.07*** |
Matched | 1.7853 | 1.8654 | −0.0802 | 0.0550 | −1.46 |