Table 3 Robustness test results.
From: How does inter-provincial trade promote economic growth? Empirical evidence from Chinese provinces
Variables | Robustness test 1 | Robustness test 2 | Robustness test 3 | Robustness test 4 | |
|---|---|---|---|---|---|
(1) | (2) | (3) | (4) | (5) | |
In-migration area | Out-migration area | ||||
lntrade | 0.248*** (4.20) | 0.067*** (3.32) | 0.077* (2.07) | 0.261*** (4.05) | |
lnretail_sales | 0.341*** (4.88) | ||||
lninterna_trade | 0.047** (2.07) | 0.021 (1.39) | 0.058 (1.06) | 0.054** (2.54) | 0.027 (1.11) |
lnpatents | 0.059** (2.45) | 0.003 (0.27) | 0.128*** (9.62) | 0.034 (1.22) | −0.018 (−0.75) |
lncap | 0.139** (2.70) | 0.081*** (3.45) | 0.257*** (5.49) | 0.202*** (4.33) | 0.243*** (3.72) |
lnh_cap | 1.035*** (3.00) | 0.435*** (3.61) | 1.120*** (3.66) | 1.090** (2.83) | 0.907*** (2.86) |
Constant | 2.563** (2.57) | 6.928*** (18.97) | 3.374** (3.04) | 2.900** (2.79) | 3.315*** (3.70) |
Observations | 638 | 638 | 198 | 440 | 638 |
R-squared | 0.994 | 0.998 | 0.993 | 0.990 | 0.991 |
Fixed effect | Yes | Yes | Yes | Yes | Yes |
