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Intra-class correlation in random-effects models for binary data


  • German Rodriguez

    (Princeton University)

  • Irma Elo

    (The University of Pennsylvania)


We review the concept of intra-class correlation in random-effects models for binary outcomes as estimated by Stata's xtprobit, xtlogit, and xtclog. We consider the usual measures of correlation based on a latent variable formulation of these models and note corrections to the last two procedures. We also discuss alternative measures of association based on manifest variables or actual outcomes and introduce a new command xtrho for computing these measures for all three types of models. Copyright 2003 by Stata Corporation.

Suggested Citation

  • German Rodriguez & Irma Elo, 2003. "Intra-class correlation in random-effects models for binary data," Stata Journal, StataCorp LP, vol. 3(1), pages 32-46, March.
  • Handle: RePEc:tsj:stataj:v:3:y:2003:i:1:p:32-46

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