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st: Log of nonpositive numbers

From   ucb_gal <>
Subject   st: Log of nonpositive numbers
Date   Fri, 28 Mar 2008 22:56:43 -0700 (PDT)


I've seen this question asked a few other times, but I'm still a little unclear on what the considerations are in thinking this through.

I'm running logistic regressions with the log of income and wealth as independent variables.  I've seen this done often enough that I didn't really think twice about it.  But then I realized that while I don't have a ton of cases with exact 0 values in either variable, I do have a number of cases with negative wealth.  And all of these show up as missing now.

Am I mistaken in thinking that I've seen studies that use the log of income as predictors??


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