Search Results
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 ...
Working Paper
Taxation, Compliance, and Clandestine Activities
We investigate the delicate balance policymakers have to strike between raising tax revenues for public good provision and controlling the distortionary effects of taxes on (i) tax evasion, (ii) total work hours, and (iii) the allocation of work hours to illegal activities. These distortions lower the constrained optimal tax rate and result in the under-provision of the public good. This under-provision problem is mitigated when surplus from the audit agency is seamlessly transferred to the taxing authorities. Extensions of the basic model incorporate agent heterogeneity and a more general ...
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.
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.
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
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 ...
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 ...
Working Paper
Counterterrorism Policy: Spillovers, Regime Stability, and Corner Solutions
This paper takes a unique approach to the scenario where a resident terrorist group in a (fragile) developing nation poses a terrorism threat at home and abroad. The host developing nation’s proactive countermeasures against the resident terrorist group not only limits terrorism at home and abroad, but also bolsters regime stability at home. A two-stage game is presented in which the developed country takes a leadership role to institute a tax-subsidy combination to discourage (encourage) proactive measures at home (abroad) in stage 1. Stage 2 involves both nations’ counterterrorism ...
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 ...
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.