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FACTREF: Stata module to insert new observations with reference values for factors

Author

Listed:
  • Roger Newson

    (King's College London)

Programming Language

Stata

Abstract

factref is used with factext, descsave, parmby and parmest (q.v.). It takes, as input, a data set created by parmby or parmest, in which categorical variables (factors) have been created by descsave and factext. These factors are variables (numeric or string) representing categorical variables in the fitted model, represented by dummy variables such as those created by xi. factref adds to that data set a set of additional observations with reference values for these factors, copied from the omit characteristic for each factor. For each factor, factref creates one reference observation if there are non-missing values for the factor and there is no by-variable list, or one reference observation for each by-group where there are non-missing values of the factor if there is a by-variable list. After the reference observations have been added, the user may create a plot or table of confidence intervals for factor effects.

Suggested Citation

  • Roger Newson, 2001. "FACTREF: Stata module to insert new observations with reference values for factors," Statistical Software Components S419603, Boston College Department of Economics, revised 22 Feb 2007.
    • Handle: RePEc:boc:bocode:s419603
    Note: This module may be installed from within Stata by typing "ssc install factref". 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.
    as

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    File URL: http://fmwww.bc.edu/repec/bocode/f/factref.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/f/factref.hlp
    File Function: help file
    Download Restriction: no
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    More about this item

    Keywords

    data manipulation; Stata;

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