Table 6 Exclude other policy interferences.
From: Does the green patent pre-examination program reduce environmental pollution?
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | |
|---|---|---|---|---|---|---|---|---|
SO2 | Dust | SO2 | Dust | SO2 | Dust | SO2 | Dust | |
DID | −0.2492*** (−4.5949) | −0.2011*** (−2.9471) | −0.2828*** (−5.0467) | −0.2534*** (−3.8389) | −0.2550*** (−4.7344) | −0.2049*** (−3.0004) | −0.1957** (−2.5550) | −0.2959*** (−3.2421) |
DID_T | −0.1841** (−2.5057) | 0.0202 (0.1715) | ||||||
DID_C | 0.2070*** (4.8529) | 0.0666 (1.0255) | ||||||
Constant | 8.7709*** (8.4515) | 10.2325*** (8.3363) | 8.4138*** (8.1219) | 9.8842*** (7.9078) | 8.8743*** (8.5350) | 10.2526*** (8.3454) | 10.8594*** (7.7515) | 12.7988*** (7.8241) |
Observations | 2550 | 2550 | 2190 | 2190 | 2550 | 2550 | 1380 | 1380 |
R-squared | 0.8941 | 0.8328 | 0.8928 | 0.8298 | 0.8945 | 0.8329 | 0.8907 | 0.8282 |
Controls | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
City FE | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Year FE | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
(9) | (10) | (11) | (12) | (13) | (14) | (15) | (16) | |
|---|---|---|---|---|---|---|---|---|
SO2 | Dust | SO2 | Dust | SO2 | Dust | SO2 | Dust | |
DID | −0.2376* (−4.3981) | −0.1990* (−2.9235) | −0.2850* (−4.1678) | −0.3312* (−5.1129) | −0.2416* (−4.4650) | −0.1991* (−2.9196) | −0.2843* (−3.8852) | −0.1248 (−1.4213) |
DID_N | −0.1450* (−2.8895) | −0.0536 (−0.8360) | ||||||
DID_Z | 0.1089* (1.7571) | 0.0904 (1.1821) | ||||||
Constant | 8.7976* (8.5168) | 10.2277* (8.3220) | 8.1047* (6.7989) | 8.7376* (6.6811) | 8.8594* (8.5488) | 10.2771* (8.3504) | 7.1545* (5.5190) | 9.1099* (6.2558) |
Observations | 2550 | 2550 | 1990 | 1990 | 2550 | 2550 | 1660 | 1660 |
R-squared | 0.8942 | 0.8329 | 0.8922 | 0.8429 | 0.8941 | 0.8330 | 0.8888 | 0.8454 |
Controls | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
City FE | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Year FE | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
