The "sampleSelection" project

The "sampleSelection" project includes add-on packages for the statistical software R for estimating models with limited dependent variables.

Currently, the "sampleSelection" project includes four R packages:

censReg: censored regression ("Tobit") models
intReg: interval regression models
mvProbit: multivariate probit models
sampleSelection: sample selection ("Heckman") models

Released versions

The officially released versions of these packages, including documentation, source code, etc., are available from the Comprehensive R Archive Network (CRAN):

censReg: http://cran.r-project.org/package=censReg
intReg: http://cran.r-project.org/package=intReg
mvProbit: http://cran.r-project.org/package=mvProbit
sampleSelection: http://cran.r-project.org/package=sampleSelection

You can install theese packages by the R command:

 install.packages( "packageName" )

Development versions

The (potentially unstable) development versions of these packages are available from R-Forge:

https://r-forge.r-project.org/R/?group_id=256

You can install theese packages by the R command:

 install.packages( "packageName", repos="http://R-Forge.R-project.org" )

Questions, bug reports, feature requests, etc.

Please ask questions, report bugs, and suggest new features via a forum or "tracker" at the R-Forge site of the "sampleSelection" project:

http://r-forge.r-project.org/projects/sampleselection/

Authors

All packages within the "sampleSelection" project have been written by:

License

All packages in the "sampleSelection" project are published under the GNU General Public License (GPL)

Last Update: 27 January 2012