Heterogeneity estimation results
| (1) | (2) | (3) | (4) | |
|---|---|---|---|---|
| Variables | Eastern (SO2) | Central (SO2) | Western (SO2) | Northeast (SO2) |
| GPP | −0.0866*** (0.0334) | −0.2198*** (0.0649) | −0.1302 (0.1026) | 0.0059 (0.0670) |
| Constant | 18.3883*** (1.5193) | 8.4863*** (1.9327) | 9.9274*** (1.3018) | 4.2185** (1.8530) |
| Observations | 109,318 | 46,728 | 39,628 | 19,440 |
| Adjusted R2 | 0.7909 | 0.7503 | 0.7516 | 0.8441 |
| Controls | Yes | Yes | Yes | Yes |
| Year FE | Yes | Yes | Yes | Yes |
| Firm FE | Yes | Yes | Yes | Yes |
| (1) | (2) | (3) | (4) | |
|---|---|---|---|---|
| Variables | Eastern (SO2) | Central (SO2) | Western (SO2) | Northeast (SO2) |
| GPP | −0.0866 | −0.2198 | −0.1302 (0.1026) | 0.0059 (0.0670) |
| Constant | 18.3883 | 8.4863 | 9.9274 | 4.2185 |
| Observations | 109,318 | 46,728 | 39,628 | 19,440 |
| Adjusted | 0.7909 | 0.7503 | 0.7516 | 0.8441 |
| Controls | Yes | Yes | Yes | Yes |
| Year FE | Yes | Yes | Yes | Yes |
| Firm FE | Yes | Yes | Yes | Yes |
*, ** and ***, respectively, indicate that the significance is 10, 5 and 1%; the values in brackets are robust standard errors for clustering to industry-year
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