Impact of digital economic development and environmental pollution on residents’ health: an empirical analysis based on 279 prefecture-level cities in China

Table 4 Robustness test of replacing core independent variables

Variable	(7) HD	(8) LNM	(9) HD
LNDIG ₂	-0.2753^c (0.1418)	-0.1259^a (0.0292)	-0.2416^b (0.0932)
LNM			0.4930^b (0.1848)
_Cons	17.8968^a (2.6769)	2.6828^a (0.3184)	10.639^a (1.2882)
Control Variable	Control	Control	Control
Fixed Effect	Double fixed effect	Double fixed effect	Double fixed effect
N	1 953	1 953	1 953
R ²	0.3385	0.7107	0.3386

^a, ^b, and ^c, respectively, indicates significance at the 1, 5, and 10% level. Robustness standard error in Parentheses

ISSN: 1471-2458