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Option Pricing in a Multi-Asset, Complete Market Economy

Journal of Financial and Quantitative Analysis 2002 37(4), 649
This paper extends the seminal Cox-Ross-Rubinstein ((1979), CRR hereafter) binomial model to multiple assets. It differs from previous models in that it is derived under the complete market environment specified by Duffie and Huang (1985) and He (1990). The complete market assumption requires the number of states to grow linearly with the number of assets. However, the number of correlations grows at a faster rate, causing the CRR model to be indirectly extendable. We solve such a problem by recognizing that the fast growing correlation number is matched by the number of the angles of the edges of a hypercube spanned by the risky assets. As a result, we derive a solution that allows the number of equations to equal the number of risky assets and the riskless bond. The resulting tree structure hence provides the same intuition of pricing and hedging contingent claims as that provided by the CRR model. Finally, the proposed model is not only as easy to implement as the one-dimensional CRR model but also it is more memory efficient than the existing multi-factor lattice models.

Is skin in the game a game changer? Evidence from mandatory changes of D&O insurance policies

Journal of Accounting and Economics 2019 68(1), 101225
This paper examines the incentive effects of a mandatory personal deductible in liability insurance contracts for directors and officers (D&Os). Exploiting a novel German law that mandates personal deductibles for executives, we document positive returns for affected firms around the first announcement of the plan to impose a personal deductible. We also find evidence of long-run effects: affected firms decrease risk taking in operational activities and financial reporting, and improve the quality of takeover decisions. Our study shows that the structure of D&O insurance contracts matters because mandating that D&Os have “skin in the game” appears to lead to real effects on firm value.

Managerial Entrenchment and Information Production

Journal of Financial and Quantitative Analysis 2020 55(8), 2500-2529
In this article, we evaluate the effect of managerial entrenchment on corporate information production using the voting outcomes of shareholder-initiated proposals intended to mitigate managerial entrenchment. We focus on the proposals that are passed or rejected by a small margin of votes, which generate plausibly exogenous variations in managerial entrenchment. We find that a reduction in managerial entrenchment enhances corporate information production. The effects are stronger for firms with greater information asymmetries and severer agency frictions. Overall, the evidence is consistent with the view that reducing managerial entrenchment enhances corporate disclosure by aligning the incentives of managers and shareholders.

Competition and Bank Liquidity Creation

Journal of Financial and Quantitative Analysis 2019 54(2), 513-538 open access
We use a new identification strategy to assess whether an intensification of competition among banks increases or decreases the provision of a key banking service: liquidity creation. Although theory offers conflicting predictions about the impact of competition on liquidity creation, we find that regulatory-induced competition reduces liquidity creation. Consistent with a subset of models emphasizing that banks pushed toward insolvency reduce risk-taking activities, we discover that regulatory-induced competition reduces liquidity creation more among banks with less risk-absorbing capacity (e.g., less profitable banks).

Corporate Resilience to Banking Crises: The Roles of Trust and Trade Credit

Journal of Financial and Quantitative Analysis 2018 53(4), 1441-1477 open access
Are firms more resilient to systemic banking crises in economies with higher levels of social trust? Using firm-level data in 34 countries from 1990 through 2011, we find that liquidity-dependent firms in high-trust countries obtain more trade credit and suffer smaller drops in profits and employment during banking crises than similar firms in low-trust economies. The results are consistent with the view that when banking crises block the normal bank-lending channel, greater social trust facilitates access to informal finance, cushioning the effects of these crises on corporate profits and employment.

Alliances and Return Predictability

Journal of Financial and Quantitative Analysis 2016 51(5), 1689-1717
Building on the growing literature on interfirm links and limited attention, we find evidence of return predictability across alliance partners. A long–short portfolio sorted on lagged returns of strategic alliance partners provides a return of 89 basis points per month that is robust to a number of specifications. Investor inattention and limits to arbitrage may be the source of the underreaction of a firm’s returns to that of its partners.

The Client Is King: Do Mutual Fund Relationships Bias Analyst Recommendations?

Journal of Accounting Research 2013 51(1), 165-200
This paper investigates whether the business relations between mutual funds and brokerage firms influence sell‐side analyst recommendations. Using a unique data set that discloses brokerage firms’ commission income derived from each mutual fund client as well as the share holdings of these mutual funds, we find that an analyst's recommendation on a stock relative to consensus is significantly higher if the stock is held by the mutual fund clients of the analyst's brokerage firm. The optimism in analyst recommendations increases with the weight of the stock in a mutual fund client's portfolio and the commission revenue generated from the mutual fund client. However, this favorable recommendation bias toward a client's existing portfolio stocks is mitigated if the stock in question is highly visible to other mutual fund investors. Abnormal stock returns are significantly greater both for the announcement period and, in the long run, for favorable stock recommendations from analysts not subject to client pressure than for equally favorable recommendations from business‐related analysts. In addition, we find that, subsequent to announcements of bad news from the covered firms, analysts are significantly less likely to downgrade a stock held by client mutual funds. Mutual funds increase their holdings in a stock that receives a favorable recommendation but this impact is significantly reduced if the recommendation comes from analysts subject to client pressure.

Bank deregulation and corporate risk

Journal of Corporate Finance 2020 60, 101520
Although research shows that competitive banks spur corporate growth, less is known about the impact of bank competition on corporate risk. Using a sample of more than 70,000 firm-year observations covering the period from 1975 through 1994, we find that deregulation that intensified competition among banks materially reduced corporate risk, especially among firms that rely heavily on bank finance. We find that competition-enhancing bank deregulation reduced corporate volatility by easing credit constraints when firms experience adverse shocks and reducing the procyclicality of borrowing.

Epidemic disease and financial development

Journal of Financial Economics 2022 143(1), 332-358 open access
We study the impact of an epidemic disease on modern financial development by exploiting geographic variations in the precolonial survival conditions of the TseTse fly, which transmits an epidemic disease that is harmful to humans and fatal to livestock in Africa. Using newly georeferenced data, we discover that firms and households in regions historically more exposed to the epidemic disease have less access to external financing today. Exploring the channels, we find that people in historically infested regions are less likely to trust others and financial institutions, to share credit information and to learn and adopt new financial technologies.

Institutional shareholders and corporate social responsibility

Journal of Financial Economics 2020 135(2), 483-504 open access
This study uses two distinct quasi-natural experiments to examine the effect of institutional shareholders on corporate social responsibility (CSR). We first find that an exogenous increase in institutional holding caused by Russell Index reconstitutions improves portfolio firms’ CSR performance. We then find that firms have lower CSR ratings when shareholders are distracted due to exogenous shocks. Moreover, the effect of institutional ownership is stronger in CSR categories that are financially material. Furthermore, we show that institutional shareholders influence CSR through CSR-related proposals. Overall, our results suggest that institutional shareholders can generate real social impact.