In the article published in this issue of HSR (Vol. 41, No. 4: pp. 1317–36), entitled “The Effect of State Medicaid Case-Mix Payment on Nursing Home Resident Acuity” by Zhanlian Feng, David C. Grabowski, Orna Intrator, and Vincent Mor, the authors erroneously acknowledged the NIA Grant AG20557. The correct grant for credit should be AG23622.