Table 7 Robustness test results for the... | Emerald Publishing

Table 7

Robustness test results for the benchmark regression and regional heterogeneity

Tests	PSM-DID				Remove “broadband China” policy cities
Group	Total	East	Central	West	Total	East	Central	West
DID	0.149**	0.575***	0.178**	0.050	0.100	0.651***	0.041	−0.026
DID	(2.16)	(3.29)	(2.48)	(0.75)	(1.17)	(3.07)	(0.59)	(−10.37)
Control variables	controlled	controlled	controlled	controlled	controlled	controlled	controlled	controlled
Constant	2,209	649	715	807	−26.707***	−52.432***	−4.501	−8.090**
Constant	0.925	0.937	0.938	0.935	(−12.96)	(−13.19)	(−10.79)	(−12.07)
Observations	2,209	649	715	807	1,417	429	414	546
R-squared	0.925	0.937	0.938	0.935	0.927	0.936	0.959	0.935

Tests	PSM-DID				Remove “broadband China” policy cities
Group	Total	East	Central	West	Total	East	Central	West
DID	0.149**	0.575***	0.178**	0.050	0.100	0.651***	0.041	−0.026
DID	(2.16)	(3.29)	(2.48)	(0.75)	(1.17)	(3.07)	(0.59)	(−10.37)
Control variables	controlled	controlled	controlled	controlled	controlled	controlled	controlled	controlled
Constant	2,209	649	715	807	−26.707***	−52.432***	−4.501	−8.090**
Constant	0.925	0.937	0.938	0.935	(−12.96)	(−13.19)	(−10.79)	(−12.07)
Observations	2,209	649	715	807	1,417	429	414	546
R-squared	0.925	0.937	0.938	0.935	0.927	0.936	0.959	0.935

Source(s): Authors' own work