Improvement of Different Types of Environmental Regulations on Total Factor Productivity: A Threshold Effect Analysis

Table 2

Classification and measurement of environmental regulation.

Classification standard	First-level index	Measurement index	Unit
Command-and-control environmental regulation	The human input of environmental agencies	The number of people at all levels of the regional environmental protection system at the end of the year	Person
	Number of environmental protection cases handled by environmental protection organizations	Environmental administrative punishment cases accepted	Case
	Opinions and suggestions on environmental protection administration accepted by environmental protection organizations	Number of environmental proposals accepted during the two sessions	Proposal
	Implementation of environmental impact assessment of enterprise investment projects from environmental protection institutions	Implementation rate of the environmental impact assessment system	%
Market incentive environmental regulation	Environmental incentive intensity under the market function	The proportion of the total collection of pollution charges in GDP	%
Voluntary conscious environmental regulation	Input intensity of active promotion of environmental protection	The total number of letters and calls (telephone and network) per 1000 people	Pieces/1000 persons