Table 4.

Regression results of our model for the health of residents. ln(envm)²: quadratic term of the logarithm of the environmental governance; ln(hosp)²: quadratic term of the logarithm of the medical level.

Variables	CZT City Cluster		Wuhan City Cluster		CPL City Cluster			City Clusters Along the Middle Reaches of the Yangtze River
	Model 9	Model 10	Model 11	Model 12	Model 13	Model 14	Model 15	Model 16	Model 17
C	8.34 ***	12.87 ***	4.98 ***	13.88 ***	5.06 ***	5.87 ***	5.65 ***	5.85 ***	8.04 ***
lngdpgr	−0.56 ***	−0.58 ***	−0.54 ***	−0.52 ***	−0.19 ***	−0.18 ***	−0.18 ***	−0.30 ***	−0.30 ***
lnenvp	0.01	−0.01	0.11 ***	0.15 ***	0.06 ***	0.05 ***	0.05 ***	0.06 ***	0.05 ***
lnhosp	−0.07 **	−0.09 **	−0.07	−0.12	0.11 ***	0.12 ***	0.21 ***	0.007	−0.02
envm	0.01 ***	0.06 ***	0.38 *	0.13 ***	0.002 ***	0.01 ***	0.01 ***	0.001 *	0.03 ***
ln(envm)2		−0.46 ***		−0.10 ***		−0.10 ***			−0.25 ***
ln(hosp)2							−0.016 *
F-value	19.3 ***	22.3 ***	163.9 ***	80.0 ***	101.3 ***	248.2 ***	97.3 ***	59.7 ***	63.2 ***
${{\displaystyle R}}^2$	0.7	0.75	0.95	0.91	0.92	0.97	0.92	0.85	0.86
Sample size	104	104	130	130	130	130	130	364	364

Note: ***, ** and * mean the significance at the 1%, 5% and 10% levels, respectively.