Table 4.
Estimation results by PSM-DID method.
| Variables | (1) | (2) | (3) | (4) | (5) | (6) |
|---|---|---|---|---|---|---|
| lnPM2.5 | lnPM2.5 | lnPM2.5 | lnPM2.5 | lnPM2.5 | lnPM2.5 | |
| LCCP | −0.0877 *** | −0.1947 *** | −0.1933 *** | −0.2057 *** | −0.1997 *** | −0.1529 *** |
| (0.0319) | (0.0314) | (0.0314) | (0.0307) | (0.0288) | (0.0282) | |
| lnRGDP | −0.2527 *** | −0.2550 *** | −0.2383 *** | −0.0505 ** | 0.0169 | |
| (0.0201) | (0.0201) | (0.0197) | (0.0209) | (0.0211) | ||
| lnHUM | −0.0292 *** | −0.0505 *** | 0.0104 | 0.0146 | ||
| (0.0107) | (0.0105) | (0.0104) | (0.0101) | |||
| lnFDI | 0.0948 *** | 0.1078 *** | 0.1101 *** | |||
| (0.0070) | (0.0066) | (0.0065) | ||||
| lnFIN | −0.4057 *** | −0.3692 *** | ||||
| (0.0211) | (0.0208) | |||||
| lnINFOR | −0.2050 *** | |||||
| (0.0165) | ||||||
| Cons | 3.5199 *** | 5.6130 *** | 5.5900 *** | 5.4297 *** | 3.4117 *** | 2.1826 *** |
| (0.0102) | (0.2000) | (0.2000) | (0.1955) | (0.2114) | (0.2286) | |
| N | 2780 | 2779 | 2778 | 2735 | 2735 | 2726 |
| R2 | 0.0030 | 0.1340 | 0.1360 | 0.1890 | 0.2860 | 0.3250 |
Note: ** and *** indicate significance at the 5% and 1% levels respectively. Standard errors are in parentheses.