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- Title
Commentary on “Mediation analysis and categorical variables: The final frontier” by Dawn Iacobucci
- Authors
MacKinnon, David P.; Cox, Matthew G.
- Abstract
Abstract: The commentary discusses several topics in Dr. Iacobucci''s article on mediation analysis with categorical variables including the lack of equivalency of mediated effect measures, ab, and c–c′, that are algebraically equivalent in ordinary least squares regression models. The commentary raises the issue of correlated mediation coefficients and presents formulas to include the correlation in the test of significance. References to new developments in causal mediation analysis for categorical variables are given and the importance of programs of research to establish a mediation theory is emphasized.
- Subjects
MEDIATION; CATEGORIES (Mathematics); IACOBUCCI, Dawn; EQUIVALENCY tests; REGRESSION analysis; STOCHASTIC frontier analysis
- Publication
Journal of Consumer Psychology (John Wiley & Sons, Inc. ), 2012, Vol 22, Issue 4, p600
- ISSN
1057-7408
- Publication type
Article
- DOI
10.1016/j.jcps.2012.03.009