As far as I can tell it is formatted correctly and there is not an obvious mathematical reason (e.g., high correlation with another control variable) that would screw up the calculations. I’d really like the variable to be in there. When I remove it from the equation, the procedure works fine. ![]() When I include one particular variable in the logistic regression, it causes the errors I’ve listed below. ![]() I am trying to use propensity score matching in SPSS.
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