| (8) | (9) | (10) | (11) |
ALL | EAST | MID | WEST | |
govsize | 0.451** | −0.220 | 0.205*** | 0.715*** |
| (0.170) | (0.863) | (1.055) | (0.181) |
invest | −0.068 | 0.102 | 0.097 | −0.077 |
| (0.060) | (0.177) | (0.103) | (0.089) |
optrade | −0.201** | −0.165 | −0.170 | 0.073 |
| (0.064) | (0.080) | (0.414) | (0.181) |
lnlab | −0.240*** | −0.195* | −0.304* | −0.363** |
| (0.047) | (0.075) | (0.112) | (0.081) |
N | 290 | 80 | 64 | 88 |
R2 | 0.330 | 0.247 | 0.363 | 0.464 |