Safra, Zvi; Weissengrin, Einat - In: Social Choice and Welfare 20 (2003) 2, pp. 177-187
In this paper we extend Harsanyi's impartial observer theorem by showing that the large domain of social lotteries can be significantly restricted – it is sufficient that the domain consists only of constant extended lotteries. Copyright Springer-Verlag Berlin Heidelberg 2003
