Efficient Full Implementation via Transfers: Uniqueness and Sensitivity in Symmetric Environments

We study efficient full implementation via transfers in unique rationalizable strategies environments that are symmetric two senses: first, agents display the same total level of preference interdependence; second, types commonly known to be drawn from distributions with identical (but unknown) means. characterize conditions under which is possible direct mechanisms, as well transfer schemes achieve it whenever possible. discuss a further robustness property--robustness mistaken play--and show uniquely selects scheme induces an even redistribution strategic externalities.