| 变量 | 直接效应 | 间接效应 | 总效应 | 
| lnict | 0.3243** | 0.3334 | 0.6577* | 
| lnpgdp | 0.2747*** | −0.0801 | 0.1946 | 
| ln2pgdp | −0.7894** | 1.6004* | 0.8110 | 
| lnope | 0.0200* | −0.1645*** | −0.1445*** | 
| lneg | 0.0485*** | 0.1416*** | 0.1901*** | 
| lnurb | 1.6078*** | −2.9602*** | −1.3524 | 
| lntec | −0.0621 | 0.2176 | 0.1555 |