Government-Enterprise Collusion and the Effectiveness of Environmental Regulations: Implications for Public Health

Table 7

The moderating effect of promotion incentives under city heterogeneity.

Variables	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
	3-year tenure criterion			5-year tenure criterion			Without considering tenure
	WaterI	SootI	SO2I	WaterI	SootI	SO2I	WaterI	SootI	SO2I
General cities	−0.007 (−0.54)	0.046 (2.05)	0.024 (1.22)	−0.005 (−0.75)	0.044 (3.99)	0.013 (1.42)	0.008 (1.22)	0.052 (5.16)	0.034 (3.82)
High-level cities	−0.029 (−0.96)	0.105 (1.86)	0.117 (2.38)	−0.044 (−3.24)	−0.010 (−0.42)	0.022 (0.98)	−0.023 (−1.69)	−0.004 (−0.18)	0.013 (0.62)
Control variables	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
City fixed	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes