TY - JOUR A1 - Wolff, J.L. A1 - Cornman, J.C. A1 - Freedman, V.A. T1 - The number of family caregivers helping older U.S adults increased from 18 million to 24 million, 2011–22 Y1 - 2025 DO - 10.1377/hlthaff.2024.00978 VL - 44 IS - 2 ER -