做了内核匹配，但是都不懂结果，求助大家解读结果，谢谢！

. psmatch2 migrant, kernel outcome(income) pscore(logit)
----------------------------------------------------------------------------------------
        Variable     Sample |    Treated     Controls   Difference         S.E.   T-stat
----------------------------+-----------------------------------------------------------
          income  Unmatched | 1591.71334   1287.90028   303.813063   32.3577164     9.39
                        ATT | 1673.76127   1343.68351    330.07776   49.8879937     6.62
----------------------------+-----------------------------------------------------------
Note: S.E. does not take into account that the propensity score is estimated.