Table 1 EE evaluation index system.

From: Research on eco-efficiency of provinces along the Belt and Road in China based on DEA methods and AI prediction algorithms

Type

Indicators

Description

Unit

Input indicators

Labor

Number of employed persons at the end of the year

Ten thousand people

Capital

Total social fixed asset investment

Billion yuan

Land

Urban built-up area

Km2

Energy

Energy consumption

10,000 t

Data

Number of Internet access ports

Ten thousand

Desired output indicators

Economic output

Real GDP

Billion yuan

Non-expected output indicators

Pollution emission

Industrial wastewater

10,000 t

Sulfur dioxide

10,000 t

Smoke (dust) emissions

10,000 t