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CLARIFY: Software for Interpreting and Presenting Statistical Results (version 2.1, January 5, 2003)
The current version of Clarify simulates quantities of interest for the most commonly used statistical models, including linear regression, binary logit, binary probit, ordered logit, ordered probit, multinomial logit, Poisson regression, negative binomial regression, the weibull duration model, and systems of seemingly unrelated regression equations. It also allows analysis of compositional data, including multiparty elections, as described in Michael Tomz, Joshua Tucker, and Jason Wittenberg, "An Easy and Accurate Regression Model for Multiparty Electoral Data" Political Analysis 10, no. 1 (Winter 2002): 66-83. Subsequent versions of Clarify will compute quantities of interest for other statistical models.
To install Clarify, remove previous versions from your computer and then type "net from http://gking.harvard.edu/clarify" at the Stata command line. You will then be prompted to type "net install clarify", which will download all necessary files and install them in the proper location on your hard drive. We also provide a zip archive for users who want to install Clarify on a computer that is not connected to the internet.
Full documentation is available here. You may also be interested in slides from a half-day course on "Interpreting and Presenting Statistical Results."
Clarify won the 1999 APSA Award for the Best Research Software in Political Science.