| 变量 | crste | vrste | scale |
| lnsubs | −0.174*** | −0.147*** | −0.0670** |
| (0.0338) | (0.0264) | (0.0262) | |
| lntraining | 0.0191* | 0.0142** | −0.00195 |
| (0.0104) | (0.00824) | (0.00825) | |
| lnedv | 0.202*** | 0.225*** | 0.0406 |
| (0.0595) | (0.0476) | (0.0349) | |
| lncoop | 0.0509** | 0.0304 | 0.0370** |
| (0.0258) | (0.0212) | (0.0185) | |
| lncrosser | 0.0490* | 0.0447** | 0.0221 |
| (0.0269) | (0.0209) | (0.0150) | |
| policy | − | − | − |
| − | − | − | |
| Constant | −0.202 | −0.421 | 0.865** |
| (0.568) | (0.475) | (0.341) | |
| Observations | 196 | 196 | 196 |
| Number of code | 28 | 28 | 28 |