1. Acharya, A.; Wall, H. J. "An Evaluation of the United Nations' Human Development Index,"Journal of Economic and Social Measurement, 20, 1, 1994, pp. 51–65.
2. Adelman, I.; Morris, C. T.Society, Politics, and Economic Development: A Quantitative Approach, Baltimore, MD: Johns Hopkins Press, 1967.
3. Association of American Railroads.Railroad Facts, Washington, DC: AAR, 1991.
4. Camp, S.; Speidel, J. J.The International Human Suffering Index, Washington, DC: Population Crisis Committee, 1987.
5. Campos, N. F.; Nugent, J. B. "Development Performance and the Institutions of Governance: Evidence from East Asia and Latin America,"World Development, 27, 3, 1999, pp. 439–52.