statsmodels/statsmodels — pull request #1994 by kshedden (2014-09-24 01:54:56+00:00)
Title: ENH: GEE exposure and improvements to from_formula

This PR adds exposure to GEE, which should behave equivalently to exposure in GLM.

I also added better argument handling in from_formula, so that exposure and/or offset can be passed as variable names or as data arrays.

There are also some new tests for offset, exposure, and predict.