11
$\begingroup$

I have a dataset where I need to do linear regression. Unfortunately there is a problem with heteroscedasticity. I´ve rerun the analysis using robust regression with the HC3 estimator for the variance and also done bootstrapping with the bootcov function in Hmisc for R. The results are quite close. What is generally recommended?

$\endgroup$
4
  • $\begingroup$ What R package did you use for HC3 estimation? sandwich, contrast? $\endgroup$
    – chl
    Sep 15, 2010 at 19:46
  • $\begingroup$ Another question while we are in: What is the design you are considering, I mean is there any clustering or multiple predictors, or is it a simple linear regression? This may help the reader to better understand the context of your study. $\endgroup$
    – chl
    Sep 15, 2010 at 20:47
  • $\begingroup$ Have you tried re-expressing the dependent variable to stabilize variance? $\endgroup$
    – whuber
    Sep 15, 2010 at 21:34
  • $\begingroup$ I´m using the sandwich package for the HC3 estimator. I´m using just simple linear regression. Intuitively I feel more comfortable with the bootstrap version and I guess I´ll stick with that. //thx for the input $\endgroup$
    – Misha
    Sep 16, 2010 at 5:19

2 Answers 2

5
$\begingroup$

In economics, the Eicker-White or "robust" standard errors are typically reported. Bootstrapping (unfortunately, I'd say) is less common. I'd say that the robust estimates are the standard version.

$\endgroup$
3
$\begingroup$

You could use generalized least squares, such as the gls() function from the nlme package, which allows you to specify a variance function using the weight argument.

$\endgroup$
1
  • $\begingroup$ What criterion should we use to choose the variance function class? $\endgroup$
    – Rafael
    Mar 20, 2015 at 2:41

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.