Does Digital Economy Contribute to Regional Carbon Productivity? Evidence of China

Table 10

Robustness test.

	Coef.	Std. err.	t		95% conf. interval
	1.1630	0.0084	138.85	0.000	1.1459	1.1801
	0.0189	0.0091	2.08	0.047	0.0003	0.0374
	−0.0740	0.0245	−3.02	0.005	−0.1241	−0.0239
	0.0441	0.0102	4.34	0.000	0.0233	0.0649
	−0.0655	0.0988	−0.66	0.512	−0.2675	0.1365
	−0.0151	0.0048	−3.14	0.004	−0.0249	−0.0053
	−0.0249	0.0052	−4.80	0.100	−0.0355	−0.0143
	−0.0626	0.0116	−5.38	0.033	−0.0864	−0.0388
	0.1655	0.0155	10.66	0.000	0.1337	0.1973
AR (1)	z = −2.03 p = 0.043
AR (2)	z = −1.12 p = 0.263
Hansen test of overid	p = 1.000

Note. , , and indicate the significance at the level of 0.01, 0.05, and 0.1, respectively.