Table 4 Robustness and endogeneity tests results.
From: The impact of artificial intelligence on green economy efficiency under integrated governance
Variables | (1) | (2) | (3) | (4) |
|---|---|---|---|---|
GEE | GEE | GEE | GEE | |
L.GEE | − 0.491 (− 1.580) | |||
L.AI | 0.826*** (17.100) | |||
AI | 0.281*** (7.830) | 0.512*** (2.750) | 0.595*** (11.790) | 0.399*** (7.890) |
IIS | 0.435*** (2.810) | 0.377 (0.630) | 0.344*** (2.580) | 0.376 (0.831) |
PGDP | − 0.479*** (− 2.760) | − 2.258** (− 2.030) | − 0.162 (− 1.080) | − 0.159** (− 2.230) |
ISU | 0.0598 (1.220) | − 0.191 (− 1.070) | 0.0391 (0.890) | 0.0290 (0.790) |
IL | 0.354*** (3.850) | 0.773* (1.83) | 0.263*** (3.230) | 0.653* (1.95) |
Cons | 0.693*** (5.700) | 0.521*** (4.740) | 0.377 (0.630) | |
id | Yes | Yes | Yes | Yes |
Year | Yes | Yes | Yes | Yes |
N | 300 | 300 | 300 | 300 |
R2 | 0.969 | 0.954 | 0.969 | |
AR(2) | 0.596 | |||
Hansen test | 0.156 | |||
Cragg-Donald Wald F | 292.546*** | |||
Kleibergen-Paap rk Wald F | 58.580*** | |||
Kleibergen-Paap rk LM statistic | 689.349*** |
