2.4-18 (April 26, 2011): JSS version, no change in code.
2.4-17 (April 2, 2011): a minor documentation fix.
2.4-16 (January 8, 2011): a bug fix for user defined distance.
2.4-15 (December 11, 2010): a bug fix in the
mahalanobis matching.
2.4-14 (August 12, 2010): a bug fix in match.data() so that it can be called within a function (thanks
to Ajay Shah, George Baah, and Ben Dominique); MATCHITnow does not
specify digits for printing (thanks to Chris Hane); A summary table
of matched data is now stored in the output (thanks to George Baah)
2.4-11 (June 25, 2009): More flexible inputs in
plotting.
2.4-10 (February 2, 2009): Minor documentation fixes
2.4-8,2.4-9 (January 29, 2009): Minor documentation fixes
2.4-7 (August 4, 2008): Fixed minor bug in subclassification
(thanks to Ben Domingue)
2.4-6 (July 21, 2008): Improved summary object for
exact matching (thanks to Andrew Stokes)
2.4-5 (July 20, 2008): Fixed a minor bug.
2.4-4 (July 18, 2008): Fixed another bug with regard to the discard option (thanks to Ben Dominique).
2.4-3 (July 18, 2008): Fixed a bug in full matching
regarding the discard option (thanks to Ben Dominique). Some updates
of documentation regarding coarsened exact matching (2.4-1 and
2.4-2).
2.4 (June 12, 2008): Included coarsened exact matching;
documentation bug fixes (thanks to Will Lowe)
2.3-1 (October 11, 2007): Stable release for R
2.6. Documentation improved. Some minor bug fixes and improvements.
2.2-14 (September 2, 2007): Stable release for R 2.5.
Documentation improved for full matching. (Thanks to Langche Zeng)
2.2-13 (April 10, 2007): Stable release for R
2.4. Additional fix to package dependencies. Bug fix for summary().
2.2-12 (April 6, 2007): Stable release for R 2.4. Fix
to package dependencies.
2.2-11 (July 13, 2006): Stable release for R 2.3.
Fix to ensure summary() command works with character variables in dataframe (thanks to Daniel Gerlanc).
2.2-10 (May 9, 2006): Stable release for R 2.3.
A bug fix in demo(analysis) (thanks to Julia Gray).
2.2-9 (May 3, 2006): Stable release for R 2.3.
A minor change to DESCRIPTION file.
2.2-8 (May 1, 2006): Stable release for R 2.3.
Removed dependency on Zelig (thanks to Dave Kane).
2.2-7 (April 11, 2006): Stable release for R 2.2.
Error message for missing values in the data frame added
(thanks to Olivia Lau).
2.2-6 (April 4, 2006): Stable release for R 2.2.
Bug fixes related to reestimate in matchit() and match.data() (thanks to Ani Ruhil and Claire Aussems).
2.2-5 (December 7, 2005): Stable release for R 2.2.
Changed URL of WhatIf to CRAN.
2.2-4 (December 3, 2005): Stable release for R 2.2.
User's own distance measure can be used with MATCHIT (thanks to
Nelson Lim).
2.2-3 (November 18, 2005): Stable release for R 2.2.
standardize option added to full matching and subclass (thanks to
Jeronimo Cortina).
2.2-2 (November 9, 2005): Stable release for R 2.2.
optmatch package now on CRAN. Changed URL for that package.
2.2-1 (November 1, 2005): Stable release for R 2.2.
balance measures based on empirical CDF are added as a new option
standardize in summary().
2.1-4 (October 14, 2005): Stable release for R 2.2.
strictly empirical (no interpolation) quantile-quantile functions
and plots are used.
2.1-3 (September 27, 2005): Stable release for R 2.1.
automated the installation of optional packages. fixed a coding
error in summary(), the documentation edited.
2.1-2 (September 27, 2005): Stable release for R 2.1.
minor changes to file names, the option "whichxs" added to the
plot(), major editing of the documentation.
2.1-1 (September 16, 2005): Stable release for R
2.1. Genetic matching added.
2.0-1 (August 29, 2005): Stable release for R 2.1.
Major revisions including some syntax changes. Statistical tests are
no longer used for balance checking, which are now based on the
empirical covariate distributions (e.g., quantile-quantile plot).
1.0-2 (August 10, 2005): Stable release for R
2.1. Minor bug fixes (Thanks to Bart Bonikowski).
1.0-1 (January 3, 2005): Stable release for R 2.0. The
first official version of MATCHIT
