QQPLOT3: Stata module to plot the unweighted and weighted quantiles of one variable against the corresponding quantiles of another

Ariel Linden

Statistical Software Components from Boston College Department of Economics

Abstract: qqplot3 generates a quantile-quantile plot (Q-Q plot), in which the quantiles of one variable are plotted against the quantiles of another. qqplot3 holds three advantages over qqplot. First and most importantly, qqplot3 allows the user to specify weights. This enables visual inspection of unadjusted and weighted baseline covariates to assess balance, a necessary condition for causal inference. This similarly makes Q-Q plots accessible to investigators with complex survey designs using sampling weights. Second, unlike qqplot, qqplot3 provides a "by" option for a grouping variable (such as treatment assignment) - a convenience factor for the user. And third, qqplot3 provides the option of saving the quantiles generated by the program, which may be useful for conducting additional analyses.

Language: Stata
Requires: Stata version 13 and fixsort from SSC (q.v.)
Keywords: qqplot; covariate balance; weighting (search for similar items in EconPapers)
Date: 2014-06-27
Note: This module should be installed from within Stata by typing "ssc install qqplot3". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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Citations: View citations in EconPapers (1)

Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/q/qqplot3.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/q/qqplot3.sthlp help file (text/plain)

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