Speaking Stata: A set of utilities for managing missing values
Nicholas J. Cox
Department of Geography
Durham University
Durham, UK
[email protected]
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Abstract. Identifying frequencies and patterns of missing values and preliminary cleaning
of missing data are common and fundamental parts of statistical data
management. I offer a new command, missings, as a replacement for, and
extension of, my previous commands nmissing (Cox 1999, Stata
Technical Bulletin 49: 7–8; 2001a, Stata Technical Bulletin
60: 2–3; 2003, Stata Journal 3: 449; 2005, Stata Journal 5:
607) and dropmiss (Cox 2001b, Stata Technical Bulletin 60:
7–8; 2008, Stata Journal 8: 594). I also make comparisons with
similar commands.
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Nicholas J. Cox
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missing, missing values, system missing, extended missing values, data management, numeric variables, string variables, drop, list, table, tag
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