xgroup is an extended version of the egen function group(varlist). It inputs a varlist of existing variables, and generates as output a new variable, defining a grouping of the observations by the varlist, and also an output dataset (or resultsset), with 1 observation per non-missing value of the new output variable, and data on the values of the input variables corresponding to that value of the output variable. The output dataset is sorted primarily by the new grouping variable, and secondarily by the variables in the varlist, allowing the output dataset to be merged into other datasets, using the official Stata command merge or the SSC package addinby. xgroup is typically used together with the SSC packages parmest and factext when a multiple-intercept model is fitted to the data, with 1 intercept for each combination of values for the varlist.
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Publisher Info
Software component provided by Boston College Department of Economics in its series Statistical Software Components with number
S456956.
Size: Programming language: Stata Requires: Stata version 10.0 Date of creation: 26 Jan 2009 Date of revision:
04 Feb 2009 Handle: RePEc:boc:bocode:s456996
Note: This module may be installed from within Stata by typing "ssc install xgroup". Windows users should not attempt to download these files with a web browser. Contact details of provider: Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA Phone: 617-552-3670 Fax: +1-617-552-2308 Email: Web page: http://fmwww.bc.edu/EC/ More information through EDIRC