We study the problem of how to allocate a set of indivisible objects like jobs or houses and an amount of money among a group of people as fairly and as efficiently as possible. A particular constraint for such an allocation is that every person should be assigned with the same number of objects...

The Pennsylvania Liquor Control Board (PLCB) controls the purchase and sale of alcoholic beverages across the state and is legally mandated to charge a uniform 30% mark-up on all products. This paper investigates the welfare implications of this uniform markup. We show that consumption patterns...

A random assignment is robust ex-post Pareto efficient whenever for any of its lottery decomposition, each deterministic assignment in its support is Pareto efficient. We show that ordinal efficiency implies robust ex-post Pareto efficiency while the reverse does not hold. We know that...

The set of fair (i.e. envy free and efficient) allocation rules may be empty in well-behaved pure exchange economies if the agents are asymmetrically informed at the time of contracting. In addition, there may exist efficient allocation rules such that every agent envies another