A Note on cost monotonic group decision mechanisms

Abstract

In this paper we study the problem of project selection as a group decision making problem and obtain a characterization of cost monotonic group decision mechanism. We furnish two examples of cost monotonic group decision mechanisms the egalitarian mechanism and the egalitarian equivalent mechanism. The latter is shown to belong to the core of the group decision making problem. In the process of defining an egalitarian equivalent mechanisms we invoke the concept of a composite public good.