We introduce ex-ante Pareto efficiency, which is a slightly weaker notion of efficiency than ex-post Pareto efficiency …. We strengthen the impossibility between ex-post Pareto efficiency, strategyproofness, and envy-freeness in the random … assignment problem and show that it prevails if ex-post Pareto efficiency is weakened to ex-ante Pareto efficiency …

We extend the scope of random allocation mechanisms, in which the mechanism first identifies a feasible "expected … allocation" and then implements it by randomizing over nearby feasible integer allocations. Previous literature had shown that … treated as goals rather than hard constraints then, subject to weak conditions that we identify, any expected allocation that …

Economic analysis of spectrum allocation policies focuses on competitive bidding for wireless licenses. Auctions … the relationship between spectrum policy (including license auctions) and efficiency in output markets. In cross …