| East | Central | West | ||
| SAR | SEM | SEM | SEM | |
| Lnopen | 0.920*** | 1.306*** | −0.023 | 2.601*** |
| (2.29) | (2.93) | (−0.023) | (5.51) | |
| Lnhum | 0.173*** | −0.228*** | 0.242 | 0.252** |
| (4.95) | (−2.85) | (0.64) | (2.40) | |
| Lntransp | −0.079 | 0.120** | −0.58** | −0.958*** |
| (−1.31) | (2.08) | (−3.17) | (−5.62) | |
| Lngov | 0.013 | 0.195*** | 0.201 | 0.161** |
| (0.34) | (5.48) | (0.76) | (1.97) | |
| Lnopenhum | −0.009 | −0.135** | −0.0.11 | 0.156*** |
| (−0.42) | (−2.26) | (−0.08) | (6.29) | |
| Lnopentransp | −0.101* | 0.118** | −0.176** | −0.308*** |
| (−1.92) | (2.49) | (−2.52) | (−4.90) | |
| Lnopengov | 0.102*** | 0.133*** | 0.060 | 0.099** |
| (3.40) | (4.01) | (0.59) | (2.40) | |
| Lnmp | 0.088** | 0.037 | −0.097*** | 0.123*** |
| (2.05) | (1.36) | (−3.17) | (3.53) | |
| Spat.aut. | 0.448*** | 0.718*** | 0.741*** | 0.648*** |
| (5.98) | (14.33) | (15.98) | (10.55) | |
| N | 192 | 192 | 144 | 144 |