DwyerD. S., & MitchellO. S. (1999). Health problems as determinants of retirement: Are self-rated measures endogenous?Journal of Health Economics, 18, 173–193.
4.
KellyS. M. (2009). Demographics of vision loss in the United States: Dealing with definitions. Journal of Visual Impairment & Blindness, 103, 185–186.
5.
SternS. (1989). Measuring the effects of disability on labor force participation. Journal of Human Resources, 24, 361–365.
6.
ZuckermanD. M. (2004). Blind adults in America: Their lives and challenges.Washington, DC: National Center for Policy Research for Women & Families.