Search Results
Report
Non-Bank Financial Institutions and Banks’ Fire-Sale Vulnerabilities
Banks carry significant exposures to nonbanks from direct dealings, but they can also be exposed, indirectly, through losses in asset values resulting from fire-sale events. We assess the vulnerability of U.S. banks to fire sales potentially originating from any of twelve separate nonbank segments and identify network-like externalities driven by the interconnectedness across nonbank types in terms of asset holdings. We document that such network externalities can contribute to very large multiples of an original fire sale, thus suggesting that conventional assessments of fire-sale ...
Report
The Role of Uncertainty and Risk in Climate Change Economics
This chapter is an introductory essay to the volume Climate Change Economics: The Role of Uncertainty and Risk, edited by V. V. Chari and Robert Litterman. This volume consists of a collection of papers that were presented at "The Next Generation of Economic Models of Climate Change," a conference hosted by the Heller-Hurwicz Economics Institute at the University of Minnesota.
Working Paper
Congestion, Agglomeration, and the Structure of Cities
Supersede WP 13-25. Congestion costs in urban areas are significant and clearly represent a negative externality. Nonetheless, economists also recognize the production advantages of urban density in the form of positive agglomeration externalities. The long-run equilibrium outcomes in economies with multiple correlated but o setting externalities have yet to be fully explored in the literature. Therefore, I develop a spatial equilibrium model of urban structure that includes both congestion costs and agglomeration externalities. I then estimate the structural parameters of the model using a ...
Speech
The theory and practice of supervision--Remarks at the SIFMA Internal Auditors Society Education Luncheon, Harvard Club, New York City
Remarks at the SIFMA Internal Auditors Society Education Luncheon, Harvard Club, New York City.
Journal Article
How Do Economists Think about the Environment and Climate Change?
While pollution can create a role for government intervention, issues like free-riding and others make reducing global greenhouse gas emissions difficult.
Working Paper
Optimal Epidemic Control in Equilibrium with Imperfect Testing and Enforcement
We analyze equilibrium behavior and optimal policy within a Susceptible-Infected-Recovered epidemic model augmented with potentially undiagnosed agents who infer their health status and a social planner with imperfect enforcement of social distancing. We define and prove the existence of a perfect Bayesian Markov competitive equilibrium and contrast it with the efficient allocation subject to the same informational constraints. We identify two externalities, static (individual actions affect current risk of infection) and dynamic (individual actions affect future disease prevalence), and ...
Speech
Is there room for more monetary cooperation?: panel discussion remarks at the Global Financial Stability in a New Monetary Environment conference, Paris, France
Panel discussion remarks at the Global Financial Stability in a New Monetary Environment conference, Paris, France.
Discussion Paper
Externalities in securities clearing and settlement: Should securities CCPs clear trades for everyone?
The architecture of securities clearing and settlement in the United States creates an externality: Investors do not always bear the full cost of settlement risk for their trades and can impose some of these costs on the brokerages where they are customers. When markets are volatile and settlement risk is high, this externality can result in too much or too little trading relative to the efficient level, because investors ignore trading costs but brokerages may refuse to allow investors to trade. Both effects were evident during the recent volatility in GameStop stock. Alternative approaches ...
Working Paper
A Shortage of Short Sales: Explaining the Underutilization of a Foreclosure Alternative
The Great Recession led to widespread mortgage defaults, with borrowers resorting to both foreclosures and short sales to resolve their defaults. I first quantify the economic impact of foreclosures relative to short sales by comparing the home price implications of both. After accounting for omitted variable bias, I find that homes selling as short sales transact at 9.2% to 10.5% higher prices on average than those that sell after foreclosure. Short sales also exert smaller negative externalities than foreclosures, with one short sale decreasing nearby property values by 1 percentage point ...
Working Paper
The Economics of Platforms in a Walrasian Framework
We present a tractable model of platform competition in a general equilibrium setting. We endogenize the size, number, and type of each platform, while allowing for different user types in utility and impact on platform costs. The economy is Pareto effcient because platforms internalize the network effects of adding more or different types of users by offering type-specific contracts that state both the number and composition of platform users. Using the Walrasian equilibrium concept, the sum of type-specific fees paid cover platform costs. Given the Pareto efficiency of our environment, we ...