Kosuke Imai writes: There are several problems. See previous messages on the list. 1) The installation help page for MatchIt gives a command that does not work. See: -------------------------- bash-2.05b$ R --vanilla R : Copyright 2004, The R Foundation for Statistical Computing Version 1.9.1 (2004-06-21), ISBN 3-900051-00-3 R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for a HTML browser interface to help. Type 'q()' to quit R. WARNING: UTF-8 locales are not currently supported trying URL `http://gking.harvard.edu/src/contrib/PACKAGES' Content type `text/plain' length 2035 bytes opened URL . downloaded 2035 bytes Warning messages: 1: argument `lib' is missing: using /home/dkane/rlib in: install.packages("matchit", CRAN = "http://gking.harvard.edu") 2: No package "matchit" on CRAN. in: download.packages(pkgs, destdir = tmpd, available = available, ------------------------------ I think that one needs to specify the "lib" argument, although I am not sure. 2) Even with the "lib" argument, you get a failure. ------------------------------ trying URL `http://gking.harvard.edu/src/contrib/PACKAGES' Content type `text/plain' length 2035 bytes opened URL . downloaded 2035 bytes Warning message: No package "matchit" on CRAN. in: download.packages(pkgs, destdir = tmpd, available = available, ------------------------------- This problem has been around for a while. Note that Zelig works for me. 3) The source code and/or tar balls for the latest version (0.1-4) does not seem to be available. At least I don't seem them here: http://www.people.fas.harvard.edu/~deho/src/contrib/ Although perhaps I should be looking elsewhere. 4) Daniel Ho was kind enough to provide me with a tar ball for version 0.1-4 (which I mistakenly deleted after installing it). Alas, it doesn't work for me. See here for the details: http://lists.hmdc.harvard.edu/lists/matchit/2004_07/msg00005.html Can you get the simple commands that I demonstrate there to work? Thanks for your time. Dave -- David Kane Kane Capital Management 646-644-3626 - MatchIt mailing list served by Harvard-MIT Data Center List Address: matchit(a)latte.harvard.edu Subscribe/Unsubscribe: http://lists.hmdc.harvard.edu/?info=matchit MatchIt Software and Documentation: http://gking.harvard.edu/matchit/

Thanks very much for your time and effort, and for making so many excellent tools publicly available. I look forward to using MatchIt. If I occasionally sound like a surly user, it is only because I am such an eager user . . . ;-) Dave Kosuke Imai writes: -- David Kane Kane Capital Management 646-644-3626 - MatchIt mailing list served by Harvard-MIT Data Center List Address: matchit(a)latte.harvard.edu Subscribe/Unsubscribe: http://lists.hmdc.harvard.edu/?info=matchit MatchIt Software and Documentation: http://gking.harvard.edu/matchit/

Thanks for your time. I still see the same error as before: Exact matching...Done Calculating summary statistics...Done Assignment model specification: matchit(formula = treat ~ black, data = lalonde, exact = TRUE) Sample sizes for full and exactly matched data: Treated Control Total Full 185 429 614 Matched 185 429 614 Error in apply(covariates, 2, qoi, tt = treat, ww = weights) : dim(X) must have a positive length Package: Matchit Version: 0.1-5 Date: 2004-08-05 Title: Matchit: Matching Software for Causal Inference Author: Daniel Ho <deho(a)fas.harvard.edu>du>, Elizabeth Stuart <stuart(a)stat.harvard.edu>du>, Kosuke Imai <kimai(a)Princeton.Edu>du>, Gary King <king(a)harvard.edu> Maintainer: Daniel Ho <deho(a)fas.harvard.edu> Depends: R (>= 1.9.0) Description: Matchit selects matched samples of the the original treated and control groups with similar covariate distributions -- can be used to match exactly on covariates, to match on propensity scores, or perform a variety of other matching procedures. License: GPL URL: http://gking.harvard.edu/matchit Packaged: Thu Aug 5 22:04:07 2004; kimai Built: R 1.9.1; ; 2004-08-06 07:25:31; unix -- File: /home/dkane/rlib/Matchit/DESCRIPTION Am I missing something? Let me know if I should report traceback's or anything else. Thanks, Dave Kosuke Imai writes: > Hi Dave, > We have fixed these problems that you pointed out. The new version won't > be released probably until next week, but I wanted to give you a tar ball > so that you can play with it. Thanks for using the software and please let > us know if you encounter any problem or have any suggestion to improve > Matchit functionalities. > Thanks, > Kosuke > --------------------------------------------------------- > Kosuke Imai Office: Corwin Hall 041 > Assistant Professor Phone: 609-258-6601 > Department of Politics eFax: 973-556-1929 > Princeton University Email: kimai(a)Princeton.Edu > Princeton, NJ 08544-1012 http://www.princeton.edu/~kimai > --------------------------------------------------------- > On Thu, 5 Aug 2004, David Kane wrote: > > Kosuke Imai writes: > > > Hi, > > > I have Linux and R 1.9.1, but it works fine. What problem do you have? > > > There are several problems. See previous messages on the list. > > > 1) The installation help page for MatchIt gives a command that does > > not work. See: > > > -------------------------- > > bash-2.05b$ R --vanilla > > > R : Copyright 2004, The R Foundation for Statistical Computing > > Version 1.9.1 (2004-06-21), ISBN 3-900051-00-3 > > > R is free software and comes with ABSOLUTELY NO WARRANTY. > > You are welcome to redistribute it under certain conditions. > > Type 'license()' or 'licence()' for distribution details. > > > R is a collaborative project with many contributors. > > Type 'contributors()' for more information and > > 'citation()' on how to cite R in publications. > > > Type 'demo()' for some demos, 'help()' for on-line help, or > > 'help.start()' for a HTML browser interface to help. > > Type 'q()' to quit R. > > > WARNING: UTF-8 locales are not currently supported > > > > install.packages("matchit", CRAN="http://gking.harvard.edu") > > trying URL `http://gking.harvard.edu/src/contrib/PACKAGES' > > Content type `text/plain' length 2035 bytes > > opened URL > > . > > downloaded 2035 bytes > > > Warning messages: > > 1: argument `lib' is missing: using /home/dkane/rlib in: install.packages("matchit", CRAN = "http://gking.harvard.edu") > > 2: No package "matchit" on CRAN. in: download.packages(pkgs, destdir = tmpd, available = available, > > > > > ------------------------------ > > > I think that one needs to specify the "lib" argument, although I am > > not sure. > > > 2) Even with the "lib" argument, you get a failure. > > > > ------------------------------ > > > install.packages("matchit", lib = "~/rlib/", CRAN="http://gking.harvard.edu") > > trying URL `http://gking.harvard.edu/src/contrib/PACKAGES' > > Content type `text/plain' length 2035 bytes > > opened URL > > . > > downloaded 2035 bytes > > > Warning message: > > No package "matchit" on CRAN. in: download.packages(pkgs, destdir = tmpd, available = available, > > > > > ------------------------------- > > > This problem has been around for a while. Note that Zelig works for > > me. > > > 3) The source code and/or tar balls for the latest version (0.1-4) > > does not seem to be available. At least I don't seem them here: > > > http://www.people.fas.harvard.edu/~deho/src/contrib/ > > > Although perhaps I should be looking elsewhere. > > > 4) Daniel Ho was kind enough to provide me with a tar ball for version > > 0.1-4 (which I mistakenly deleted after installing it). Alas, it > > doesn't work for me. See here for the details: > > > http://lists.hmdc.harvard.edu/lists/matchit/2004_07/msg00005.html > > > Can you get the simple commands that I demonstrate there to work? > > > Thanks for your time. > > > Dave > > > > > You might want to reinstall it by > > > > > R CMD remove > > > > > command. > > > > > Kosuke > > > > > --------------------------------------------------------- > > > Kosuke Imai Office: Corwin Hall 041 > > > Assistant Professor Phone: 609-258-6601 > > > Department of Politics eFax: 973-556-1929 > > > Princeton University Email: kimai(a)Princeton.Edu > > > Princeton, NJ 08544-1012 http://www.princeton.edu/~kimai > > > --------------------------------------------------------- > > > > > On Thu, 5 Aug 2004, David Kane wrote: > > > > > > Is anyone out there able to use the latest version of MatchIt (which I think is > > > > 0.1-4) with the latest version of R (1.9.1) on LINUX? Will this be > > > > possible anytime in the near future? > > > > > > > Any pointers would be appreciated. > > > > > > > Thanks, > > > > > > > Dave Kane > > > > > > > > > > - > > > > MatchIt mailing list served by Harvard-MIT Data Center > > > > List Address: matchit(a)latte.harvard.edu > > > > Subscribe/Unsubscribe: http://lists.hmdc.harvard.edu/?info=matchit > > > > MatchIt Software and Documentation: http://gking.harvard.edu/matchit/ > > > > > > > > > > - > > > MatchIt mailing list served by Harvard-MIT Data Center > > > List Address: matchit(a)latte.harvard.edu > > > Subscribe/Unsubscribe: http://lists.hmdc.harvard.edu/?info=matchit > > > MatchIt Software and Documentation: http://gking.harvard.edu/matchit/ > > -- David Kane Kane Capital Management 646-644-3626 - MatchIt mailing list served by Harvard-MIT Data Center List Address: matchit(a)latte.harvard.edu Subscribe/Unsubscribe: http://lists.hmdc.harvard.edu/?info=matchit MatchIt Software and Documentation: http://gking.harvard.edu/matchit/

Thanks. Problem fixed. I'll try to use the package extensively next week and report any other issues. Dave Daniel E. Ho writes: -- David Kane Kane Capital Management 646-644-3626 - MatchIt mailing list served by Harvard-MIT Data Center List Address: matchit(a)latte.harvard.edu Subscribe/Unsubscribe: http://lists.hmdc.harvard.edu/?info=matchit MatchIt Software and Documentation: http://gking.harvard.edu/matchit/