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PRODVARS: Stata module to create product variables for two lists of input variables


  • Roger Newson

    () (National Heart and Lung Institute at Imperial College London)


prodvars inputs two variable lists, known as the left variable list and the right variable list. It produces as output a list of generated variables, one for each pair of variables from the left and right variable lists, each with a variable names derived from the names of the pair of input variables, and values equal to the products of the values of the two input variables. Optionally, the generated variables may also have variable labels derived from the variable labels, or variable names, of the input variables. prodvars is useful for calculating variables for the design matrix of a multiple-intercept model.

Suggested Citation

  • Roger Newson, 2008. "PRODVARS: Stata module to create product variables for two lists of input variables," Statistical Software Components S456952, Boston College Department of Economics, revised 09 Feb 2011.
  • Handle: RePEc:boc:bocode:s456952
    Note: This module should be installed from within Stata by typing "ssc install prodvars". Windows users should not attempt to download these files with a web browser.

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    data manipulation; products;


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