The Journal of Finance publishes leading research across all the major fields of finance. It is one of the most widely cited journals in academic finance, and in all of economics. Each of the six issues per year reaches over 8,000 academics, finance professionals, libraries, and government and financial institutions around the world. The journal is the official publication of The American Finance Association, the premier academic organization devoted to the study and promotion of knowledge about financial economics.
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Limits of Arbitrage: Theory and Evidence from the Mortgage‐Backed Securities Market
Published: 03/20/2007 | DOI: 10.1111/j.1540-6261.2007.01217.x
XAVIER GABAIX, ARVIND KRISHNAMURTHY, OLIVIER VIGNERON
“Limits of Arbitrage” theories hypothesize that the marginal investor in a particular asset market is a specialized arbitrageur rather than a diversified representative investor. We examine the mortgage‐backed securities (MBS) market in this light. We show that the risk of homeowner prepayment, which is a wash in the aggregate, is priced in the MBS market. The covariance of prepayment risk with aggregate wealth implies the wrong sign to match the observed prices of prepayment risk. The price of risk is better explained by a kernel based on MBS market‐wide specific risk, consistent with the specialized arbitrageur hypothesis.
Dynamic CEO Compensation
Published: 09/12/2012 | DOI: 10.1111/j.1540-6261.2012.01768.x
ALEX EDMANS, XAVIER GABAIX, TOMASZ SADZIK, YULIY SANNIKOV
We study optimal compensation in a dynamic framework where the CEO consumes in multiple periods, can undo the contract by privately saving, and can temporarily inflate earnings. We obtain a simple closed‐form contract that yields clear predictions for how the level and performance sensitivity of pay vary over time and across firms. The contract can be implemented by escrowing the CEO's pay into a “Dynamic Incentive Account” that comprises cash and the firm's equity. The account features state‐dependent rebalancing to ensure its equity proportion is always sufficient to induce effort, and time‐dependent vesting to deter short‐termism.