Add CITATION file
Tweak formatting of code in helpfile examples and vignettes
Add subsection to README about GNU Fortran requirement for old versions of the gmm package on macOS
Bumped the minimum required version of R to be 4.1.0. This is because of the same requirement in pbkrtest, which is a dependency of car which is a dependency of ivreg
Bumped version of roxygen2 used to create the package documentation
Made use of ellipsis ... in several function
definitions safer using the ellipsis package
Bumped required version of R to 4.3.0 because the Matrix package, which is a dependency of ivreg now requires R 4.4.0. CRAN retain a binary version of Matrix 1.6-5 for the previous release of R, and so the minimum version of R can be 4.3.0 rather than 4.4.0.
Update roxygen2 version used to generate documentation
Reduce the number of functions imported from other packages
Make use of packages in Suggests list conditional on their availability
Remove ivtools from Suggests due to the current failure of its ahaz dependency package to build on 3 of the CRAN Linux sub-architectures
R CMD check note in R
4.2.0