我在用最近匹配法之后，stata只出现了匹配后的ATT，请问匹配前有命令吗？


ATT estimation with Nearest Neighbor Matching method
(random draw version)
Bootstrapped standard errors

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n. treat.   n. contr.         ATT   Std. Err.           t
---------------------------------------------------------

      133          68   28722.625   12295.900       2.336

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Note: the numbers of treated and controls refer to actual
nearest neighbour matches