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14 results

In search of preference shock risks: Evidence from longevity risks and momentum profits

Journal of Financial Economics 2019 133(1), 225-249
Time-preference shocks affect agents’ preferences for assets with different durations. We consider longevity risk as a source of time-preference shocks and model it in the recursive preferences setting. This implies a consumption-based three-factor model, including longevity risk, consumption growth rate, and the market portfolio, where longevity has a negative price of risk. Empirically, this model explains many well-known cross-sectional portfolios. Notably, we find that longevity risk and the momentum factor share a common business cycle component, i.e., short-run consumption risks. Prior winners (losers) provide hedging against mortality (longevity) risk and thus have higher (lower) expected returns, because winners have higher dividend growth and shorter equity durations than losers. Time-varying longevity risk captures most momentum profits over time, including the large momentum crashes observed in the data.

Optimal Tax Timing with Asymmetric Long-Term/Short-Term Capital Gains Tax

Review of Financial Studies 2015 28(9), 2687-2721
We develop an optimal tax-timing model that takes into account asymmetric long-term and short-term tax rates for positive capital gains and limited tax deductibility of capital losses. In contrast to the existing literature, this model can help explain why many investors not only defer short-term capital losses to long term but also defer large long-term capital gains and losses. Because the benefit of tax deductibility of capital losses increases with the short-term tax rates, effective tax rates can decrease as short-term capital gains tax rates increase.

Insider pledging: Its information content and forced sale

Journal of Corporate Finance 2024 89, 102655
This paper investigates the information content of insider pledging and the forced sale of pledged shares using U.S. data. Contrary to warnings from proxy advisors and the media about insider pledging and suggestions for its prohibition, our findings show that insider pledging announcements do not negatively impact shareholder wealth. Firms with insider pledging experience positive one-year abnormal stock returns and higher future profitability after the disclosure of pledging, indicating that insider pledging signals a firm's better growth prospects. These positive abnormal returns observed after the disclosure of insider pledging are more pronounced in firms with better corporate governance and are associated with pledging by certain insiders with superior information. In addition, we find that the stock price does not significantly decline following the forced sale of pledged shares, indicating that the forced sale does not pose downside risks for shareholders. Overall, our results suggest that insider pledging is not detrimental to shareholder value in the U.S., contrary to findings reported in the literature on emerging markets.

Nonlinearly weighted convex risk measure and its application

Journal of Banking & Finance 2011 35(7), 1777-1793
We propose a new class of risk measures which satisfy convexity and monotonicity, two well-accepted axioms a reasonable and realistic risk measure should satisfy. Through a nonlinear weight function, the new measure can flexibly reflect the investor’s degree of risk aversion, and can control the fat-tail phenomenon of the loss distribution. A realistic portfolio selection model with typical market frictions taken into account is established based on the new measure. Real data from the Chinese stock markets and American stock markets are used for empirical comparison of the new risk measure with the expected shortfall risk measure. The in-sample and out-of-sample empirical results show that the new risk measure and the corresponding portfolio selection model can not only reflect the investor’s risk-averse attitude and the impact of different trading constraints, but can find robust optimal portfolios, which are superior to the corresponding optimal portfolios obtained under the expected shortfall risk measure.

Stability and Regime Change: The Evolution of Accounting Standards

The Accounting Review 2023 98(3), 135-152
ABSTRACT We examine the evolution of accounting regulation by linking disclosure policies and investments in a dynamic voting model. The disclosure policies are the outcome of voting by entrepreneurs, whose preferences are influenced by their investments. The investments are in turn endogenously determined by current and future disclosure policies. Absent external influences, accounting regimes are stable. A disclosure regime of high (low) quality and a strong (weak) economy coexist and reinforce each other. However, regulatory interventions can result in regime changes by changing the entrepreneurs’ expectations, even without direct enforcement. Unexpected shocks could also result in regime changes by impacting economic conditions and hence voter composition. Our analysis provides a framework to study the interaction between accounting regulation and firms’ economic decisions.

Measuring firm size in empirical corporate finance

Journal of Banking & Finance 2018 86, 159-176 open access
In empirical corporate finance, firm size is commonly used as an important, fundamental firm characteristic. However, no research comprehensively assesses the sensitivity of empirical results in corporate finance to different measures of firm size. This paper fills this hole by providing empirical evidence for a “measurement effect” in the “size effect”. In particular, we examine the influences of employing different proxies (total assets, total sales, and market capitalization) of firm size in 20 prominent areas in empirical corporate finance research. We highlight several empirical implications. First, in most areas of corporate finance the coefficients of firm size measures are robust in sign and statistical significance. Second, the coefficients on regressors other than firm size often change sign and significance when different size measures are used. Unfortunately, this suggests that some previous studies are not robust to different firm size proxies. Third, the goodness of fit measured by R-squared also varies with different size measures, suggesting that some measures are more relevant than others in different situations. Fourth, different proxies capture different aspects of “firm size”, and thus have different implications. Therefore, the choice of size measures needs both theoretical and empirical justification. Finally, our empirical assessment provides guidance to empirical corporate finance researchers who must use firm size measures in their work.

Women in the Courtroom: Technology and Justice

Review of Economic Studies 2026 93(3), 1574-1601 open access
Our study analyses 6 million civil judgments in China from 2014 to 2018, documenting gender disparities that disfavour female litigants. We investigate the impact of an open justice reform that mandated courts to broadcast legal proceedings live on a centralized online platform. By exploiting variations in its implementation across courts and over time and employing both difference-in-differences and Bartik IV approaches, we find that gender disparities in chances of winning decrease as broadcast intensity increases. Analysis of the textual content of judicial decisions provides further evidence that these changes in judicial outcomes stem from altered judge behaviours (i.e. attention and effort) under enhanced judicial transparency. Our results demonstrate how information technology shapes judges’ conduct, underscoring its broader potential to improve accountability in public institutions.

Predicting Future Earnings Changes Using Machine Learning and Detailed Financial Data

Journal of Accounting Research 2022 60(2), 467-515
ABSTRACT We use machine learning methods and high‐dimensional detailed financial data to predict the direction of one‐year‐ahead earnings changes. Our models show significant out‐of‐sample predictive power: the area under the receiver operating characteristics curve ranges from 67.52% to 68.66%, significantly higher than the 50% of a random guess. The annual size‐adjusted returns to hedge portfolios formed based on the prediction of our models range from 5.02% to 9.74%. Our models outperform two conventional models that use logistic regressions and small sets of accounting variables, and professional analysts’ forecasts. Analyses suggest that the outperformance relative to the conventional models stems from both nonlinear predictor interactions missed by regressions and the use of more detailed financial data by machine learning.

Share pledges and margin call pressure

Journal of Corporate Finance 2018 52, 96-117
It is common practice worldwide for corporate insiders to put up stock as collateral for personal loans. We highlight a potential problem in such pledging. When controlling shareholders face a margin call threat if stock prices fall below the required level for a loan, they have an incentive to use corporate resources for their private benefit. We develop and test a margin call hypothesis that controlling shareholders may initiate share repurchases to fend off potential margin calls associated with pledged stocks in order to maintain their control rights. Investors seem to recognize such behavior and discount the potential benefits of repurchase programs. However, share pledges are not reliably related to repurchases when control rights are not a concern. We further show that regulatory restrictions of control rights on pledging effectively reduce the likelihood of firms' repurchasing. Overall, our results shed light on the impact of share pledges on corporate decisions.

Born to behave: Home CEOs and financial misconduct*

Review of Accounting Studies 2025 30(2), 1309-1354 open access
We examine the association between CEO birthplace proximity and financial misconduct. We find that CEOs managing firms near their birthplaces (home CEOs) are associated with less financial misconduct compared to other CEOs. This association is not attributable to differences in corporate governance. The relationship strengthens in areas with a strong local investment presence and greater religious commitment as well as among CEOs with longer tenures in their home state. Our findings are robust to addressing potential selection and omitted variable biases as well as to conducting multiple robustness tests, including analyses of involuntary CEO changes and headquarters relocations. We also find a similar association for CFOs, with firms employing home CFOs exhibiting less financial misconduct.