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Journal Article
The Gordon Gekko effect: the role of culture in the financial industry
Culture is a potent force in shaping individual and group behavior, yet it has received scant attention in the context of financial risk management and the 2007-09 financial crisis. This article presents a brief overview of the role of culture as it is seen by psychologists, sociologists, and economists, and then describes a specific framework for analyzing culture in the context of financial practices and institutions. Using this framework, the author addresses three questions: (1) what is culture? (2) does it matter? and (3) can it be changed? He illustrates the utility of this framework by ...
Working Paper
Clouded Judgment: The Role of Sentiment in Credit Origination
Using daily fluctuations in local sunshine as an instrument for sentiment, we study its effect on day-today decisions of lower-level financial officers. Positive sentiment is associated with higher credit approvals, and negative sentiment has the opposite effect of a larger magnitude. These effects are stronger when financial decisions require more discretion, when reviews are less automated, and when capital constraints are less binding. The variation in approval rates affects ex-post financial performance and produces significant real effects. Our analysis of the economic channels suggests ...
Working Paper
Lottery Loans in the Eighteenth Century
In the 18th century Britain frequently issued lottery loans, selling bonds whose size was determined by a draw soon after the sale. The probability distribution was perfectly known ex-ante and highly skewed. After the draw the bonds were identical (except for size) and indistinguishable from regular bonds. I collect market prices for the lottery tickets and show that investors were paying a substantial premium to be exposed to this purely artificial risk. I show that investors were well-to-do and included many merchants and bankers. I turn to cumulative prospect theory to make sense of these ...
Working Paper
Biased Shorts: Short sellers’ Disposition Effect and Limits to Arbitrage
We investigate whether short sellers are subject to the disposition effect using a novel dataset that allows to identify the closing of short positions. Consistent with the disposition effect, short sellers are more likely to close a position the higher their capital gains. Furthermore, stocks with high short sale capital gains experience negative returns, suggesting that their disposition effect has an effect on stock prices. A trading strategy based on this finding achieves significant three-factor alphas. Overall, short sellers? behavioral biases limit their ability to arbitrage away the ...
Working Paper
Automated Credit Limit Increases and Consumer Welfare
In the United States, credit card companies frequently use machine learning algorithms to proactively raise credit limits for borrowers. In contrast, an increasing number of countries have begun to prohibit credit limit increases initiated by banks rather than consumers. In this paper, we exploit detailed regulatory micro data to examine the extent to which bank-initiated credit limit increases are directed towards individuals with revolving debt. We then develop a model that captures the costs and benefits of regulating proactive credit limit increases, which we use to quantify their ...