Variable name and unit

Variable symbol

Variable explanation

Green product innovation

(yuan/ton of standard coal)

GPTI

Ratio of new product sales to

energy consumption

Green process innovation

(100 million yuan)

GPSI

Sum of internal expenditure for R&D

and investment for technological

transformation

Environmental regulations

(%)

ER

Pollution control cost as a

percentage of total cost

Total profit

(100 million yuan)

Tp

Total profit of various

manufacturing industries

Investment in innovative

human resources (%)

IMI

Proportion of scientific and technological personnel of industrial enterprises above

a designated size to all employees