当在做倾向得分匹配,按照陈强老师的方法在输入时遇到,
There are observations with identical propensity score values.
The sort order of the data could affect your results.
Make sure that the sort order is random before calling psmatch2.
match_pscore(): 3200 conformability error
<istmt>: - function returned error
红色部分的应该怎么解决


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