| Dependent variable | Excluded | Chi-sq | df | Prob. |
| LNRDER | LNPA | 1.548506 | 1 | 0.2134 |
| LNRDER | LNPGDP | 2.427628 | 1 | 0.1192 |
| LNRDER | LNPA、LNPGDP | 2.470238 | 2 | 0.2908 |
| LNPA | LNRDER | 3.526930 | 1 | 0.0604 |
| LNPA | LNPGDP | 5.564823 | 1 | 0.0183 |
| LNPA | LNRDER, LNPGDP | 10.17235 | 2 | 0.0062 |
| LNPGDP | LNRDER | 0.796720 | 1 | 0.3721 |
| LNPGDP | LNPA | 0.044488 | 1 | 0.8329 |
| LNPGDP | LNRDER、LNPA | 1.173011 | 2 | 0.5563 |