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Speaking Stata: Concatenating values over observations

Author

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  • Nicholas J. Cox

    (Durham University)

Abstract

Concatenation, or joining together, of strings or other values, possibly with extra punctuation such as spaces, is supported in Stata by addition of strings and by the egen function concat(), which concatenates values of variables within observations. In this column, I discuss basic techniques for concatenating values of variables over observations, emphasizing simple loops that can be tuned to suit variants as desired. Commonly, such concatenated strings report a profile or history of each individual within panel or longitudinal data. Such histories can then be analyzed further.

Suggested Citation

  • Nicholas J. Cox, 2020. "Speaking Stata: Concatenating values over observations," Stata Journal, StataCorp LP, vol. 20(1), pages 236-243, March.
    • Handle: RePEc:tsj:stataj:y:20:y:2020:i:1:p:236-243
    DOI: 10.1177/1536867X20909698
    Note: to access software from within Stata, net describe http://www.stata-journal.com/software/sj20-1/pr0071/
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