1. Aaron, Henry J.: Politics and Professors: The Great Society in Perspective, Washington, DC 1978. Allardt, Erik: About Dimensions of Welfare, Report Nr. 1 der Research Group for Comparative Sociology, Universität Helsinki 1973.
2. Almond, Gabriel, und Sidney Verba: The Civic Culture. Political Attitudes and Democracy in Five Nations, Boston 1963.
3. Atkinson, Anthony B.: The Economics of Inequality, Oxford 1975.
4. Aberg, Rune: Distributive Mechanisms of the Welfare State. A Formal Analysis and an Empirical Application, in: European Sociological Review, 5,1989, S. 167–182.
5. Barth, Michael C, George J. Cargano und John L. Palmer: Toward an Effective Income Support System: Problems, Prospects and Choices, Madison 1974.