Table 1 The summary of variables.
Variable | Abbreviation | Description |
|---|---|---|
Dependent variables | GTFP | Input factors, desirable output, undesirable output; Super-SBM Model |
Independent variables | CER | The number of environmental case proposals submitted by provincial and municipal people’s congresses |
MER | The ratio of the completed investment in industrial pollution control in each region to the regional GDP | |
VER | Number of environmental petitions in each province and city | |
Threshold variables | RD | The proportion of enterprise R&D amount in sales revenue |
Control variables | DL | The number of digitization-related-words frequencies in enterprise annual reports |
ROA | The proportion of enterprise’s net profit in the total assets | |
ROE | The proportion of enterprise’s net profit to net assets | |
ROL | The proportion of its total liabilities to total assets | |
Scale | Enterprise total assets | |
Grouping variables | Indus | Industry pollution level |
Equ | Enterprise equity type |
