| 变量 | crste | vrste | scale |
| lnsubs | −0.166*** | −0.147*** | −0.0564** |
| (0.0334) | (0.0273) | (0.0255) | |
| lntraining | 0.0159 | 0.0132 | −0.00112 |
| (0.0104) | (0.00839) | (0.00802) | |
| lnedv | 0.148** | 0.210*** | 0.00126 |
| (0.0618) | (0.0527) | (0.0333) | |
| lncoop | 0.0605* | 0.0234 | 0.00913 |
| (0.0255) | (0.0223) | (0.0197) | |
| lncrosser | 0.0310 | 0.0444* | 0.0360** |
| (0.0274) | (0.0229) | (0.0152) | |
| policy | 0.0501** | 0.0168 | 0.0536*** |
| (0.0233) | (0.0193) | (0.0167) | |
| Constant | 0.306 | −0.240 | 1.128*** |
| (0.586) | (0.529) | (0.332) | |
| Observations | 196 | 196 | 196 |
| Number of code | 28 | 28 | 28 |