1. Valuing the invaluable: 2011 update : the growing contributions and costs of family caregiving Publication: Washington, D.C. : AARP Public Policy Institute, c2011 Subject(s): Caregivers -- economicsCaregivers -- trendsActivities of Daily LivingCaregivers -- statistics & numerical dataFamilyForecastingHealth Care CostsLong-Term Care -- economicsHumansUnited States