基于倾向得分匹配方法的中国自然保护区缓解人类活动压力评估
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张涵, 黎夏, 石洪, 刘晓娟
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An assessment of the effectiveness of China's nature reserves for mitigating anthropogenic pressures based on propensity score matching
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ZHANG Han, LI Xia, SHI Hong, LIU Xiaojuan
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表3 倾向得分匹配的平衡性检验结果
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Tab. 3 Balance test results of propensity score matching
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| 变量 | 均值 | 标准偏差
(%) | 标准偏差减小
幅度(%) | t检测 | | 实验组 | 对照组 | t统计量 | t检验相伴概率 | | lnpecp | 匹配前 | -2.5682 | -2.8677 | 37.5 | | 50.42 | 0.000 | | 匹配后 | -2.5682 | -2.5679 | 0.2 | 99.5 | 0.22 | 0.824 | | lntemp | 匹配前 | 3.9294 | 3.9054 | 10.3 | | 15.26 | 0.000 | | 匹配后 | 3.9294 | 3.935 | -2.4 | 76.9 | -2.55 | 0.011 | | lnslope | 匹配前 | 0.76959 | 0.23972 | 29.9 | | 44.54 | 0.000 | | 匹配后 | 0.76959 | 0.76637 | 0.2 | 99.4 | 0.22 | 0.829 | | lnelev | 匹配前 | 6.7174 | 6.5833 | 9.1 | | 12.84 | 0.000 | | 匹配后 | 6.7174 | 6.7039 | 0.9 | 89.9 | 1.07 | 0.286 | | lntjcq | 匹配前 | 10.496 | 10.454 | 4.3 | | 5.69 | 0.000 | | 匹配后 | 10.496 | 10.497 | -0.0 | 99.3 | -0.03 | 0.973 | | lntoroad | 匹配前 | 10.805 | 10.716 | 7.5 | | 10.06 | 0.000 | | 匹配后 | 10.805 | 10.797 | 0.7 | 91.0 | 0.76 | 0.445 | | lnlandcover | 匹配前 | 0.73629 | 0.73672 | -0.1 | | -0.10 | 0.918 | | 匹配后 | 0.73629 | 0.74132 | -0.9 | -1053.9 | -1.07 | 0.284 |
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