We arrive at new conclusions for social choice theory by considering the process in which we refine decision{theoretic models and account for previously irrelevant parameters of a decision situation (cf. Savage's 'small worlds'). Suppose that, for each individual, we consider a coarse-grained...

We discuss the feasibility of Levi's (1990) robust mode of aggregating individuals' evaluations of acts into a social choice function. We examine the process in which we refine decision{theoretic models and account for previously irrelevant parameters of a decision situation (cf. Savage's 'small...