新疆棉花主产区地膜回收对农户利润的影响

王太祥,滕晨光,张朝辉

Effects of plastic film recovery in main cotton production areas of Xinjiang on farmers’ profits

WANG Taixiang,TENG Chenguang,ZHANG Zhaohui

表3 倾向值匹配前后共变量平衡性检验结果

Table 3 Test results of covariate balance before and after propensity score matching

匹配方法 Pseudo-R2 LR统计量 p>chi2 MeanBias 匹配前 — 0.062 49.940 0.000 13.600 K近邻匹配 0.003 2.010 0.998 2.600 卡尺匹配 0.002 1.620 0.999 2.600 匹配后 核匹配 0.001 0.940 1.000 1.700 卡尺内最近邻匹配 0.004 2.750 0.994 3.100 样条匹配 0.007 4.650 0.947 4.900