Robustness checks: PSM-DID
| Variables | PSM-DID | |||
|---|---|---|---|---|
| (1) | (2) | (3) | (4) | |
| Ene | Osa | Ene | Osa | |
| Nearest-neighbor matching | Nearest-neighbor matching | Caliper matching | Caliper matching | |
| Gplant | 0.0223*** (0.0085) | 0.7290*** (0.1732) | 0.0227*** (0.0085) | 0.7747*** (0.1725) |
| Constant | 0.7191*** (0.1848) | 11.4556*** (3.6048) | 0.8009*** (0.1754) | 13.0203*** (3.4166) |
| Controls | YES | YES | YES | YES |
| Firm FE | YES | YES | YES | YES |
| Year FE | YES | YES | YES | YES |
| N | 22939 | 22939 | 26588 | 26588 |
| R2 | 0.8386 | 0.8516 | 0.8427 | 0.8552 |
| Variables | PSM-DID | |||
|---|---|---|---|---|
| (1) | (2) | (3) | (4) | |
| Ene | Osa | Ene | Osa | |
| Nearest-neighbor matching | Nearest-neighbor matching | Caliper matching | Caliper matching | |
| Gplant | 0.0223 | 0.7290 | 0.0227 | 0.7747 |
| Constant | 0.7191 | 11.4556 | 0.8009 | 13.0203 |
| Controls | ||||
| Firm | ||||
| Year | ||||
| 22939 | 22939 | 26588 | 26588 | |
| 0.8386 | 0.8516 | 0.8427 | 0.8552 | |
Standard errors at the firm-level cluster in parentheses. *p < 0.10, **p < 0.05, ***p < 0.01
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