Table 5 PSM-DID and replace the dependent variable.
From: Does the green patent pre-examination program reduce environmental pollution?
(1) | (2) | (3) | (4) | (5) | (6) | |
|---|---|---|---|---|---|---|
SO2 | Dust | SO2_2 | Dust_2 | PM | Carbon | |
DID | −0.2431*** (−3.6924) | −0.1818** (−2.3540) | −0.2826*** (−5.1102) | −0.2395*** (−3.6304) | −0.1250*** (−9.4072) | −0.0410*** (−3.8171) |
Constant | 15.1949* (7.7778) | 13.4003* (6.5026) | 1.2698 (1.1755) | 2.6974** (2.2407) | 6.7272*** (19.3041) | 0.2644 (0.7710) |
Observations | 1030 | 1030 | 2550 | 2550 | 2550 | 2520 |
R-squared | 0.8902 | 0.8465 | 0.8992 | 0.8570 | 0.9890 | 0.9821 |
City FE | Yes | Yes | Yes | Yes | Yes | Yes |
Year FE | Yes | Yes | Yes | Yes | Yes | Yes |
