We study strategy-proof rules for choosing between two alternatives. We consider the full preference domain which allows for indifference. In this framework, for strategy proof rules, ontoness does not imply efficiency. We weaken the requirement of efficiency to ontoness and characterizes the...

We study many-to-one matching problems between institutions and individuals where an institution can possibly be matched to more than one individual. The matching market contains some couples, who view pairs of jobs as complements. Institutions’ preferences over sets of individuals are assumed...

This paper studies matching markets where institutions are matched with possibly more than one individual. The matching market contains some couples who view the pair of jobs as complements. First, we show by means of an example that a stable matching may fail to exist even when both couples and...

We study a many-to-one matching problem between institutions and individuals where an institution can possibly be matched to more than one individual. The matching market contains some couples who view pairs of jobs as complements. Institutions' preferences over sets of individuals are assumed...