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

Table 6

Test results of threshold significance.

Threshold	F-value	p-value	Critical value
			1%	5%	10%
Single threshold	939.20	0.0000	80.2229	48.1164	35.7312
Double threshold	21.52	0.0467	34.9441	19.5143	15.5038
Triple threshold	10.18	0.3800	14.9872	8.0268	4.4832

, , and denote significant levels at 1%, 5%, and 10%, respectively.