Bossert, Walter; Suzumura, Kotaro - In: Mathematical Social Sciences 64 (2012) 3, pp. 258-262
In a seminal contribution, Hansson (1976) demonstrates that the collection of decisive coalitions associated with an Arrovian social welfare function forms an ultrafilter. He goes on to show that if transitivity is weakened to quasi-transitivity as the coherence property imposed on a social...