We study the effect of Medicaid expansion on wait time in the emergency department (ED), using a difference-in-differences approach, where the treatment group includes the states that expanded Medicaid at the beginning of 2014 and the control group includes the states that did not expand...

We propose a new class of hedonic models with sticky prices and queues. Time replaces money as the invisible hand in the market. Unlike money, time is non-transferable to the trading partner. We prove the existence and uniqueness of the equilibrium, and we compare our model with the standard...

Motivated in part by online marketplaces such as ridesharing and freelancing platforms, we study two-sided matching markets where agents are heterogeneous in their compatibility with different types of jobs: flexible agents can fulfill any job, whereas each specialized agent can only be matched...

We study the optimal design of a queueing system when agents' arrival and servicing are governed by a general Markov process. The designer of the system chooses entry and exit rules for agents, their service priority---or queueing discipline---as well as their information, while ensuring that...

Shortage of judicial capacity leads to costly delays, stunted economic development, and even failure to deliver justice. This problem is endemic not only in the developing world but also in the congested appeals courts of wealthier nations. Using the Supreme Court of India as an exemplar for...

I study the welfare optimal allocation of a number of identical and indivisible objects to a set of heterogeneous risk-neutral agents under the hypothesis that money is not available. Agents have independent private values, which represent the maximum time that they are willing to wait in line...