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ICCVAR: Stata module to calculate intraclass correlation (ICC) after xtmixed


  • Eric C. Hedberg

    () (University of Chicago)


iccvar is a post-estimation command for xtmixed. After fitting a 2, 3, or 4 level model with a random intercept (random slopes are not supported), iccvar will calculate the intraclass correlation (ICC) values and the associated standard errors based on the variance components and standard errors of the variance components estimated from xtmixed.

Suggested Citation

  • Eric C. Hedberg, 2012. "ICCVAR: Stata module to calculate intraclass correlation (ICC) after xtmixed," Statistical Software Components S457468, Boston College Department of Economics, revised 01 Aug 2013.
  • Handle: RePEc:boc:bocode:s457468
    Note: This module should be installed from within Stata by typing "ssc install iccvar". The module is made available under terms of the GPL v3 ( Windows users should not attempt to download these files with a web browser.

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    ICC; intraclass correlation; xtmixed;


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