| 变量 | 直接效应 | 间接效应 | 总效应 | 
| lnict | 0.3331** | 0.7208 | 1.0539* | 
| lnpgdp | 0.2454** | −0.0801 | 0.1955 | 
| ln2pgdp | −0.8761** | 0.8110* | −0.0651 | 
| lnope | 0.1389* | −0.0425* | −0.0286 | 
| lneg | 0.0657*** | 0.1449* | 0.2106* | 
| lnurb | 1.0556** | −1.0975* | −1.3524 | 
| lntec | −0.0812 | −0.0788 | 0.1555 |