Why Are the Disability Rolls Skyrocketing? The Contribution of Population Characteristics, Economic Conditions, and Program Generosity

Mark Duggan and Scott A. Imberman, Health at Older Ages: The Causes and Consequences of Declining Disability among the Elderly (University of Chicago Press, 2009), chap. 11, https://www.nber.org/books-and-chapters/health-older-ages-causes-and-consequences-declining-disability-among-elderly/why-are-disability-rolls-skyrocketing-contribution-population-characteristics-economic-conditions.