Table 1 Description of the variables used in this study.
Variable | Unit | Number of observations | Mean | Standard deviation | Min. | Max. |
|---|---|---|---|---|---|---|
Labor | 10,000 persons | 240 | 36.6 | 28.79 | 9.45 | 145.30 |
Capital | CNY 100 million | 240 | 5659.82 | 4140.16 | 777.70 | 24917.12 |
Energy | 10,000 tons of standard coal | 240 | 2276.95 | 1384.75 | 519.91 | 6733.24 |
GDP | CNY 100 million | 240 | 1538.42 | 1685.30 | 505.81 | 10739.22 |
SO2 | 10,000 tons | 240 | 66609.09 | 44781.73 | 1724 | 228,815 |
Wastewater | Ton | 240 | 10589.51 | 5384.63 | 1947 | 28,191 |
Smoke dust | Ton | 240 | 26899.44 | 21897.44 | 1795 | 119,822 |
