TY - JOUR A1 - Weisbrod, B. A. T1 - Toward a theory of the Voluntary Non-Profit Sector in a Three-sector Economy JF - Phelps, E. S. (Ed.): Altruism, morality and economic theory, New York (Russell Sage Foundation) 1975, pp. 171-196. Y1 - 1975 ER -