Quantile Regression R package quantreg version 6.1 CRAN Task View: Econometrics (https://CRAN.R-project.org/view=Econometrics) CRAN Task View: Environmetrics (https://CRAN.R-project.org/view=Environmetrics) CRAN Task View: Optimization (https://CRAN.R-project.org/view=Optimization) CRAN Task View: ReproducibleResearch (https://CRAN.R-project.org/view=ReproducibleResearch) CRAN Task View: Robust (https://CRAN.R-project.org/view=Robust) Estimation and inference methods for models for conditional quantile functions: Linear and nonlinear parametric and non-parametric (total variation penalized) models for conditional quantiles of a univariate response and several methods for handling censored survival data. Portfolio selection methods based on expected shortfall risk are also now included. See Koenker, R. (2005) Quantile Regression, Cambridge U. Press, <doi:10.1017/CBO9780511754098> and Koenker, R. et al. (2017) Handbook of Quantile Regression, CRC Press, <doi:10.1201/9781315120256>. Software Depends: R (>= 3.5), stats, SparseM Imports: methods, graphics, Matrix, MatrixModels, survival, MASS Suggests: interp, rgl, logspline, nor1mix, Formula, zoo, R.rsp, conquer Roger Koenker <rkoenker@illinois.edu> Comprehensive R Archive Network (CRAN) Roger Koenker [cre, aut], Stephen Portnoy [ctb] (Contributions to Censored QR code), Pin Tian Ng [ctb] (Contributions to Sparse QR code), Blaise Melly [ctb] (Contributions to preprocessing code), Achim Zeileis [ctb] (Contributions to dynrq code essentially identical to his dynlm code), Philip Grosjean [ctb] (Contributions to nlrq code), Cleve Moler [ctb] (author of several linpack routines), Yousef Saad [ctb] (author of sparskit2), Victor Chernozhukov [ctb] (contributions to extreme value inference code), Ivan Fernandez-Val [ctb] (contributions to extreme value inference code), Martin Maechler [ctb] (tweaks (src/chlfct.f, 'tiny','Large'), ORCID: <https://orcid.org/0000-0002-8685-9910>), Brian D Ripley [trl, ctb] (Initial (2001) R port from S (to my everlasting shame -- how could I have been so slow to adopt R!) and for numerous other suggestions and useful advice) GPL (>= 2) 2025-03-10 application/tgz https://CRAN.R-project.org/package=quantreg doi:10.32614/CRAN.package.quantreg