, 1998, Variability, uncertainty, and the emergence of firms and markets, in W. Leinfellner & E. Köhler (eds.), Game theory, experience, rationality, Dordrecht, Springer, pp. 301-314.
, 1974a, Societies and social decision functions, in W. Leinfellner & E. Köhler (eds.), Developments in the methodology of social science, Dordrecht, Springer, pp. 217-253.