Table 11 Wald test results.
From: Spatial spillover effect and heterogeneity of digital economy on agricultural carbon emissions
Test | Null hypothesis | Eastern region | Northeast region | Central region | Western region | ||||
|---|---|---|---|---|---|---|---|---|---|
Coefficient | P value | Coefficient | P value | Coefficient | P value | Coefficient | P value | ||
Wald | SDM degenerates into SAR | 49.67*** | 0.000 | 38.67*** | 0.000 | 80.89*** | 0.000 | 51.56*** | 0.000 |
SDM degenerates into SEM | 36.07*** | 0.000 | 14.89** | 0.037 | 37.65*** | 0.000 | 43.93*** | 0.000 | |
