Table 2 Statistical characteristics.
Variables | Calculation method | unit | N | Mean | Std. Dev. | Min | Max |
|---|---|---|---|---|---|---|---|
lnEI | See 3.1.1 | 10,000 tce/100 million yuan | 480 | 0.649 | 0.470 | −0.412 | 2.145 |
lnTP1 | See 3.1.2 | - | 480 | −0.013 | 0.174 | −0.635 | 0.434 |
lnTP2 | See 3.1.2 | - | 480 | −3.823 | 1.179 | −5.550 | −2.631 |
lnPGDP | Gdp/Permanent population | yuan | 480 | 10.566 | 0.612 | 8.663 | 12.013 |
lnECS | Coal consumption/Total energy consumption | - | 480 | −0.169 | 0.541 | −4.156 | 0.954 |
lnIS | Value added of the tertiary industry/Value added of the secondary industry | - | 480 | −0.003 | 0.412 | −0.694 | 1.667 |
lnEP | Fuel price index | - | 480 | 0.176 | 0.105 | −0.01 | 0.47 |
lnGI | Government general budget expenditure/GDP | - | 480 | −1.55 | 0.398 | −2.48 | −0.442 |
