51 Publications
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Exploiting a unique institutional setting in Korea, this paper documents that politicians can increase the amount of government resources allocated through their social networks to the benefit of private firms connected to these networks. After winning the election, the new president appoints members of his networks as CEOs of state-owned firms…
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In this paper, we develop a framework for measuring, allocating and managing systemic risk. SystRisk, our measure of total systemic risk, captures the a priori cost to society for providing tail-risk insurance to the financial system. Our allocation principle distributes the total systemic risk among individual institutions according to their…
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This article studies the full equilibrium dynamics of an economy with financial frictions. Due to highly nonlinear amplification effects, the economy is prone to instability and occasionally enters volatile crisis episodes. Endogenous risk, driven by asset illiquidity, persists in crisis even for very low levels of exogenous risk. This phenomenon…
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How should monetary policy and macro-prudential regulation respond to the dangers of financial bubbles? I argue that bubbles - and their collapse - become a serious problem when there is inadequate risk-sharing. Neither monetary policy nor traditional macro-prudential regulation is designed to deal with this risk-sharing problem. Monetary policy…
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Conventional tests of the predictability of stock returns could be invalid, that is reject the null too frequently, when the predictor variable is persistent and its innovations are highly correlated with returns. We develop a pretest to determine whether the conventional t-test leads to invalid inference and an efficient test of…
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This paper evaluates the equity premium using novel data on the consumption of luxury goods. Specifying utility as a nonhomothetic function of both luxury and basic consumption goods, we derive pricing equations and evaluate the risk of holding equity. Household survey and national accounts data mostly reflect basic consumption, and therefore…