Re: [R] using step() with package geepack

Is anyone else using the 'geepack' package? >>> From: "Steve Taylor" To: Date: 11/Feb/2010 11:28 a.m. Subject: [R] using step() with package geepack I'm using the package geepack to fit GEE models. Does anyone know of methods for add1 and drop1 for a 'gee

[R] using step() with package geepack

I'm using the package geepack to fit GEE models. Does anyone know of methods for add1 and drop1 for a 'geeglm' model object, or perhaps a method for extractAIC based on the QIC of Pan 2001? I see there has been some mention of this on R-help a few years ago (RSiteSearch("QIC")). The package