Nonlinear Effects of Environmental Regulation on Environmental Pollution

Table 1

Descriptive statistics for 390 observations.

Variable, Abbreviation, Unit	Mean	Standard deviation	Minimum	Maximum
Environmental pollution (Environmental pollution is structural variable with no dimension.), POL	5.248	0.423	4.308	6.329
Fee-based environmental regulation, ENF, Ten thousand yuan	55902.000	48075.000	1562.000	287343.000
Investment environmental regulation, ENI, Ten thousand yuan	165.166	167.403	5.300	1416.200
Urban environmental infrastructure construction investment, ENIA, Ten thousand yuan	99.874	119.004	1.200	1262.700
Industrial pollution source management, ENIB, Ten thousand yuan	18.105	17.113	0.200	141.600
Construction of “three simultaneity” environmental protection investment, ENIC, Ten thousand yuan	47.184	53.219	1.400	399.500
Industrial structure, STR, %	48.025	7.676	21.300	61.500
Foreign direct investment, FDI, %	2.496	1.923	0.068	8.191
Fiscal decentralization (Fiscal decentralization is also structural variable with no dimension.), FIN	0.453	0.066	0.358	0.642
Economic development level, RGDP, Ten thousand yuan	2.327	1.469	0.407	7.442