We regret that there are typographical and factual errors in the review of the book “Generalized Estimating Equations,” by J. W. Hardin and J. M. Hilbe, that appeared in the September 2013 issue. The second author is listed incorrectly as J. M. Hibe rather than as J. M. Hilbe. We apologize to Dr. Hilbe for this error. In addition, the book is mistakenly identified as being published by John Wiley and Sons when it is actually published by Chapman & Hall/CRC. These errors have been corrected in the full text (HTML) version of the book review at the Biometrics website on Wiley Online Library.