rationalizable implementation. Set-monotonicity is much weaker than Maskin monotonicity, which is the key condition for Nash … implementation and which also had been shown to be necessary for rationalizable implementation of social choice functions. Set …-monotonicity reduces to Maskin monotonicity in the case of functions. We conclude that the conditions for rationalizable implementation are …

for practical implementation mechanisms …We perform an experimental test of a modification of the controversial canonical mechanism for Nash implementation … feasibility of such implementation. In addition, the performance is further improved by imposing a fine on a dissident, so that …

alternatives on individuals’ mechanism choices in such group choice situations. While efficient mechanisms are desirable, we … experimentally show that participation constraints can prevent their implementation. We find strong indications that individual …