Hi,

I am doing propensity score matching and use the command psmatch2 in Stata 15.1. Below the table of the probit regression the following note appears:
Note: 0 failures and 7 successes completely determined.
What does that mean and what does it mean for my matching exercise? Do I need to drop covariates?

Best,
Florian


Code:
Probit regression                               Number of obs     =        386
                                                LR chi2(22)       =      92.11
                                                Prob > chi2       =     0.0000
Log likelihood = -221.50017                     Pseudo R2         =     0.1721

--------------------------------------------------------------------------------
       project |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
---------------+----------------------------------------------------------------
          e1_1 |   -.000669   .0047651    -0.14   0.888    -.0100084    .0086703
          e1_7 |   .0303307   .0547815     0.55   0.580     -.077039    .1377005
       age_hhh |  -.0017681   .0078644    -0.22   0.822     -.017182    .0136459
       sex_hhh |  -.2465505   .3251348    -0.76   0.448     -.883803    .3907021
    school_hhh |   .6577522   .3352447     1.96   0.050     .0006846     1.31482
      educ_hhh |  -.0749704   .0330397    -2.27   0.023    -.1397271   -.0102136
        hhsize |   .1239893   .2750888     0.45   0.652    -.4151749    .6631535
      adult_eq |  -.0842468    .277709    -0.30   0.762    -.6285464    .4600529
       hh_ndep |    .119057   .1689976     0.70   0.481    -.2121721    .4502862
     dep_ratio |  -.3200164   .2211388    -1.45   0.148    -.7534404    .1134076
  share_female |   .2287619   .4845245     0.47   0.637    -.7208887    1.178412
 literacy_rate |   .0695267   .4437251     0.16   0.875    -.8001585    .9392119
        dalits |  -.1225994   .2430755    -0.50   0.614    -.5990185    .3538197
     num_plots |   .3910742   .1122597     3.48   0.000     .1710493    .6110991
  lnhhlandsize |  -1.155983   .3966871    -2.91   0.004    -1.933475   -.3784904
cultivated_a~a |   .1026302   .0388921     2.64   0.008     .0264032    .1788572
share_irrig_~y |  -.6466882   .2893474    -2.23   0.025    -1.213799   -.0795777
   dtodailymkt |  -.9256896   28.15301    -0.03   0.974    -56.10457    54.25319
  dtoweeklymkt |   .8786153   28.15301     0.03   0.975    -54.30027     56.0575
           FCS |    .005458   .0049516     1.10   0.270    -.0042471     .015163
transfer_inc~e |   1.35e-06   7.18e-06     0.19   0.851    -.0000127    .0000154
    cash_remit |   1.25e-06   1.60e-06     0.78   0.435    -1.89e-06    4.39e-06
         _cons |   .1296191   .7999508     0.16   0.871    -1.438256    1.697494
--------------------------------------------------------------------------------
Note: 0 failures and 7 successes completely determined.