* 个案的随机排序
gen tmp = runiform()
sort tmp

* 匹配方法：nearest neighbor matching within caliper-最近邻匹配法
* 1-匹配得分
psmatch2 land_in_2011   gender  marriage nonagri land_quantity  asset_agri asset_non_agri, logit neighbor(1) common caliper(.05) ties
psmatch2 land_out_2011  gender  marriage nonagri land_quantity  asset_agri asset_non_agri, logit neighbor(1) common caliper(.05) ties

* 2-检验两者的平衡性
pstest  gender marriage  nonagri land_quantity  asset_agri asset_non_agri

* 3-剔除不显著的变量,again!!!
psmatch2 land_in_2011 gender  marriage nonagri  asset_non_agri , logit neighbor(1) common caliper(.05) ties
pstest gender  marriage nonagri  asset_non_agri

* 或 pscore命令来检验平衡性
pscore policy a b c d , pscore(newpscore) probit

* 估计policy对因变量y的效应
psmatch2 policy a b c d, outcome(y) logit neighbor(1) common caliper(.05)

* 平衡性的图示
psgraph

另外两个匹配方法有啥不同啊啊啊啊

楼主知道答案了吗