Penalizing strategic preference manipulation in multi-agent decision making

We consider the problem of group decision making where the selection proces s is based upon a group preference function, obtained by an aggregation of the participating agents individual preference functions. We describe some methods for formulating the group preference from the individual preference functions. We note the possibility of the individual agents strategically manipulating the information they provide, so as to further their own goal of getting their most preferred alternative selected by the group. With thi s in mind, we suggest ways of modifying the formulation of the group decisi on functions to discourage strategic manipulation by the participating agen ts.