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Post Closed as "Duplicate" by Richard Hardy, Michael R. Chernick, Maarten Buis, whuber
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Richard Hardy
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How to generate logarithms for observations in negative value

I’m doing my VAR regression with panel data on stata 12, but I face a problem with observations that are in negative value when generating logarithms. All the negative variables are missing after transformation in Logs. Is it normal or I have to correct this! Can I have a advice? Thank you!