Table 1 Definition of variables.

From: Environmental vertical management reform and firms’ ESG performance: evidence from China

Variable type

Variable symbol

Variable name

Variable definition

Explanatory variable

Vertical

Environmental vertical management reform

Enterprises under the jurisdiction of provinces are assigned a value of 1 in the year following the implementation of the reform of vertical management of environmental protection and thereafter, otherwise the value is assigned to 0.

Dependent variable

ESG

Corporate ESG performance

Sino-Securities ESG Evaluation Index

Control variable

Size

Firm size

the natural logarithm of the total assets of the firm

Age

Firm age

the observed year - the year firm was established

Lev

Firm debt ratio

the ratio of corporate liabilities to total corporate assets

ROA

Firm total asset profit ratio

net profit/total assets

Growth

Firm growth capacity

total asset growth rate

TobinQ

Firm value

Tobin’s Q value

Board

Board size

the number of directors

SOE

Ownership nature

If it is a state-owned enterprise, it is assigned a value of 1, otherwise it is 0.

ProGDP

Level of provincial economic development

Log of provincial GDP

ProGdpgrow

Provincial economic growth rate

the growth rate of GDP in the current year and the GDP in the previous year