Arrow's Theorem, countably many agents, and more visible invisible dictators
For infinite societies, Fishburn (1970), Kirman and Sondermann (1972), and Armstrong (1980) gave a nonconstructive proof of the existence of a social welfare function satisfying Arrow fs conditions (Unanimity, Independence, and Nondictatorship). This paper improves on their results by (i) giving a concrete example of such a function, and (ii) showing how to compute, from a description of a profile on a pair of alternatives, which alternative is socially preferred under the function. The introduction of a certain goracle h resolves Mihara fs impossibility result (1997) about computability of social welfare functions.
|Date of creation:||06 May 1997|
|Date of revision:||01 Jun 2004|
|Note:||Journal of Mathematical Economics (1999) 32: 267 |287|
|Contact details of provider:|| Web page: http://econwpa.repec.org|
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