Changes in version 1.6.1                        

    o   minor fixes

    o   new functions qr_var and qtr_var

                 Changes in version 1.6.0 (2025-07-28)                  

    o   new function qsmspline

    o   CRAN request to add Rd cross-references

                 Changes in version 1.5.9 (2023-10-28)                  

    o   changes in qrr

                 Changes in version 1.5.8 (2023-10-17)                  

    o   fixed bugs in qrr

    o   reorganized R code

                 Changes in version 1.5.7 (2023-09-03)                  

    o   fixed bug in rq.counts

    o   new functions for quantile ratio regression

                 Changes in version 1.5.6 (2022-05-30)                  

    o   fixed bug in rrq (thanks to Filippo Palomba for reporting)

    o   fixed bug in qlss.formula (thanks to Ilaria Prosdocimi for reporting)

    o   new function qexact

                 Changes in version 1.5.5 (2021-07-28)                  

    o   fixed bug in dqc

    o   fixed bug in midq2q

    o   fixed bug in predict.midrq

                 Changes in version 1.5.4 (2021-02-07)                  

    o   removed dependency on Gmisc after CRAN notified unsolved check problems with Gmisc

                 Changes in version 1.5.3 (2020-11-27)                  

    o   new functions for directional quantile classification (dqc)

    o   fixed CRAN checks warning on stats::filter vs mice::filter

                 Changes in version 1.5.2 (2020-07-08)                  

    o   new function midq2q for recovering classical quantiles from midquantiles

    o   fixed minor bug in vcov.midrq

    o   fixed bug in rq.counts

    o   revised plot.qlss and documentation file to avoid error on Mac

                 Changes in version 1.5.1 (2019-12-13)                  

    o   fixed CRAN error related to _R_CLASS_MATRIX_ARRAY_ starting from R 4.0.0

    o   added robust option for vcov.midrq

    o   fixed bad coding in vcov.midrq that would lead to memory overload 

                 Changes in version 1.4.1 (2019-07-13)                  

    o   new function midrq to fit mid-quantile regression with discrete responses

    o   new function midecdf to fit conditional mid-distribution functions

    o   faster implementation of GOFTest (rcTest) in C++

    o   rq.counts no longer supports tranformations other than logarithmic

    o   removed functions for quantile regression with binary responses

                  Changes in version 1.3 (2018-04-13)                   

    o   added bootstrap sampling in mice.impute.rq

    o   more robust checks in nlrq1 and nlLoss

                  Changes in version 1.2 (2017-02-20)                   

    o   new function nlrq1 for optimization of one-parameter transformations

    o   argument 'conditional' added to impute.mice.rq

    o   bug fixed in rcTest when testing multiple quantiles

    o   seed in rcTest is no longer randomly generated if seed = NULL

    o   argument 'which' in plot.qlss changed to 'whichp'

    o   bug fixed in KhmaladzeFormat (significance of tests for individual slopes)

                  Changes in version 1.1 (2016-05-26)                   

    o   bugs fixed in mice.impute.rq and mice.impute.rrq

    o   other bugs fixed

    o   revised all documentation

    o   revised qlss, tsrq functions

    o   revised functions for marginal effects

    o   new: predict.qlss, plot.qlss, print.qlss, plot.midecdf, plot.midquantile, print.midecdf, print.midquantile

    o   changed midquantile.ci to confint.midquantile (S3 method)

                  Changes in version 1.0 (2016-02-04)                   

    o   package Qtools on CRAN