1. Aday, L. (1993). Equity, accessibility, and ethical issues: Is the U.S. health care reform debate asking the right questions American Behavioral Scientist, 36(6), 724–740.
2. Aday, L., Begley, C. E., Lairson, D. R., & Slater, C. H. (1998). Evaluating the healthcare system: Effectiveness, efficiency, and equity. Chicago: Health Administration Press.
3. Agency for Health Care Policy and Research. (1997). Access to care. Research Activities, 210(November), 9.
4. Anderson, G. E, & Poullier, J.-P. (1999). Health spending, access, and outcomes: Trends in industrialized countries. Health Affairs, 18(3), 178–192.
5. Atkinson, A. B., Rainwater, L., & Smeeding, T. M. (1995). Income distribution in OECD countries. Evidence from the Luxembourg Income Study. Paris: Organization for Economic Co-operation and Development.