DUPS: Stata module to identify and optionally remove duplicate observations

Nicholas Cox () and Thomas J Steichen ()

Statistical Software Components from Boston College Department of Economics

Abstract: dups provides information about unique and duplicate observations in the dataset and, optionally, drops all duplicate observations. varlist is an optional variable list that determines which observations are duplicates (observations must match exactly on all variables in the list to be duplicates). If no varlist is given, then all variables in the dataset are used to determine duplicates. drop is a command line option that causes duplicate observations to be dropped from the dataset. Both terse and verbose options are available to modify the detail in the default output; terse gives bare minimum information; verbose lists detailed information about duplicate observations. This is version 1.0.3 of the software.

Language: Stata
Requires: Stata version 6
Keywords: duplicate observations; drop; detect (search for similar items in EconPapers)
Date: 1997-10-15, Revised 2001-09-23
Note: This module may be installed from within Stata by typing "ssc install dups". Windows users should not attempt to download these files with a web browser.

Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/d/dups.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/d/dups.hlp help file (text/plain)

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Persistent link: http://EconPapers.repec.org/RePEc:boc:bocode:s322901

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