Table 1 The descriptive statistics of input and output indicators.
Primary indicator | Secondary indicators | Mean | Std. Dev. | Min | Max |
|---|---|---|---|---|---|
Inputs | Urban construction land area | 128.960 | 265.902 | 2.340 | 2915.560 |
Capital stock | 2.60e + 07 | 4.91e + 07 | 1,062,917 | 5.00e+08 | |
Number of employees in the secondary and tertiary industries | 30.764 | 62.382 | 0.770 | 714.090 | |
Expected output | The added value of the secondary and tertiary industries | 7,257,449 | 1.69e + 07 | 85,149.660 | 2.15e+08 |
Unexpected outputs | Industrial wastewater emissions | 8646.251 | 11,744.120 | 60 | 85,735 |
Industrial smoke and dust emissions | 24,059.020 | 40,048.530 | 259 | 1,347,367 | |
Industrial SO2 emissions | 52,836.960 | 66,808.420 | 287 | 683,162 |
