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We study the problem of allocating a set of indivisible objects to a set of agents based on agents' preferences over objects and objects' "choice functions" over agents, when monetary transfers are not allowed. Following Kojima and Manea (Econometrica 78(2):633-653, 2010) and Morrill (Int J Game Theory 42(1):19-28, 2013a), this paper provides four characterizations of the agent-proposing deferred acceptance allocation rule for all acceptant substitutable choice functions. It is the only rule satisfying any one of the following groups of axioms: (1) stability, rank monotonicity; (2) non-wastefulness, top best, weak consistency, rank monotonicity; (3) non-wastefulness, strong top best, weak Maskin monotonicity; (4) non-wastefulness, strong group rationality, rank monotonicity. These results suggested that two new axioms: rank monotonicity and weak consistency, deserve further attention. They also shed light on what distinguishes the agent-proposing deferred acceptance rule from the other rules.

In the context of resource allocation on the basis of responsive priorities, Ergin (2002) identifies a necessary and sufficient condition for the deferred acceptance rule to satisfy a consistency principle. In this note, we extend this result to the domain of substitutable priorities, complementing results of Kojima and Manea (2010) and Kumano (2009). (C) 2011 Elsevier B.V. All rights reserved.