You were correct. I was incorrectly assuming the pipe was being used as an OR operator. I am working around that issue myself. As for my original question, it appears using %str() to mask commas and apostrophes in the names helps. Cheers! ... View more

There are probably variables in the model with data that is similar to other variables, producing multicollinearity. CSIndex values are monotonous or missing.   ranking - sorting numerical or ordinal variables in ascending order    multicollinearity - when one predictor variable in multiple regression model can be linearly predicted from the others   problem of multicollinearity - the coefficient estimates of the multiple regression may change erratically in response to small changes in the model or the data   some causes of multicollienarity:   inclusion of a variable which is computed from other variables in the data set; the repetition of the same kind of variable.    scaling - normalizing data to a common range   See also,   The Panel procedure: Unbalanced data ... View more