Is there a package that does an EiV regression that uses the reliability of the measures which are provided by the user? I've searched RSiteSearch("error in variable regression") As well as various permutations of these terms in google. Though I say this with some trepidation, I am looking for a procedure that is similar to what Stata's eivreg does. I have written functions that implement these methods for linear regression where the predictor variables are measured with error, but am looking to unit test my output with other packages. Thanks, Harold [[alternative HTML version deleted]]