title: How to conduct unconditional quantile regression in R?
body: <p>The only package I know that does unconditional quantile regression in R is uqr. Unfortunately, it's been removed from CRAN. Even though I can still use it, its functionality is limited (e.g., does not conduct significance tests or allow to compare effects across quantiles). I'm wondering if anyone knows how to conduct UQR in R, with either functions they wrote or some other means.</p>