变量 | (1) | (2) | (3) | (4) |
| lne | lne | lne | lne |
lncases | −0.0608*** | −0.0571*** | −0.0525*** | −0.0527*** |
| (0.0116) | (0.0115) | (0.0116) | (0.0116) |
lnw | 0.2271*** | 0.1977*** | 0.2021*** | 0.1989*** |
| (0.0414) | (0.0418) | (0.0416) | (0.0414) |
lninv | 0.1360*** | 0.1141*** | 0.1148*** | 0.1143*** |
| (0.0313) | (0.0316) | (0.0315) | (0.0313) |
lntransport | −0.0860*** | −0.0863*** | −0.0993*** | −0.0988*** |
| (0.0300) | (0.0297) | (0.0301) | (0.0299) |
lngdp |
| 0.1152*** | 0.1202*** | 0.1192*** |
|
| (0.0317) | (0.0317) | (0.0315) |