Advances in Civil Engineering / 2022 / Article / Tab 5 / Research Article
Evaluating the Effect of China’s Carbon Emission Trading Policy on Energy Efficiency of the Construction Industry Based on a Difference-in-Differences Method Variable Unmatched Matched Mean %Reduct t -testTreated Control %Bias |bias| t p > t Productivity U 36.775 24.769 105.7 8.6 0 M 28.553 27.423 9.9 90.6 0.36 0.72 Machinery U 6.5019 6.325 5.8 0.38 0.705 M 5.805 5.6612 4.7 18.7 0.16 0.877 Urbanratio U 0.72339 0.5033 188.9 14.84 0 M 0.58937 0.59442 −4.3 97.7 −0.19 0.848 Lnesratio U −1.8552 −1.7292 −20.3 −1.33 0.185 M −1.8887 −1.8012 −14.1 30.6 −0.54 0.594 Rdratio U 0.02823 0.01152 146.8 13.13 0 M 0.0165 0.01601 4.3 97.1 0.3 0.762 Pgdp U 6.6224 3.6821 128.3 10.01 0 M 4.3698 4.3081 2.7 97.9 0.1 0.92