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...

We investigate consequences of a situation in which a merged subgroup of firms leads the market, after which merger experiences reduced marginal cost. Results show that while introduction of higher cost synergy to the model increases firms' motive to merge, it may not necessarily mitigate...

The design of municipal water tariffs requires balancing multiple criteria such as financial self-sufficiency for the service provider, equity among customers and economic efficiency for society. A modeling framework is developed for analyzing how alternative municipal water tariff designs...

We introduce a new notion of ex-post efficiency for random assignment problems, namely ex-post rank efficiency that gives a maximal number of agents their favored objects. An ex-post rank efficient random assignment is a lottery over rank efficient deterministic assignments, in the sense of...