Will Gerken

Gatton College of Business and Economics, University of Kentucky, 550 S. Limestone, Lexington, KY 40526 will.gerken@uky.edu

I am the PNC Associate Professor of Finance at the Gatton College of Business and Economics at the University of Kentucky. Currently, my research focuses on the role of peer effects, disclosure, and reputation for the behavior of financial intermediaries.


PNC Associate Professor of Finance

University of Kentucky
July 2018 - Present

Assistant Professor of Finance

University of Kentucky
July 2012 - June 2018

Assistant Professor of Finance

Auburn University
August 2009 - June 2012

Education & Professional Designations

PHD - Finance

Michigan State University
August 2009

Chartered Financial Analyst

CFA Institute
September 2006


Georgia Institute of Technology
May 2004

MS - Electrical Engineering

Georgia Institute of Technology
August 2003

BS - Computer Engineering

West Virginia University
May 2001

BS - Electrical Engineering

West Virginia University
May 2001

Working Papers

Investment in Human Capital and Labor Mobility: Evidence from a Shock to Property Rights

with Chris Clifford

We show that the assignment of property rights to client relationships affects employee behavior in the industry for financial advice. Our identification comes from staggered firm-level entry into The Protocol for Broker Recruiting. The Protocol effectively transfers the ownership of the client relationship from the firm to the employee. We document that entering into the Protocol increases employee labor mobility among member firms. Further, upon Protocol inclusion, we find that employees are less likely to generate customer complaints, more likely to invest in their own general human capital, but less likely to invest in firm-specific human capital. We use detailed employee-employer matched data for the universe of financial advisors to show these effects hold within the same job spell and across advisors within the same county at the same time. Our results suggest that limiting labor mobility may limit employee incentives to invest in human capital.

Presented at 2017 MarketSummit (Miami), Beyster Institute (Rutgers), SFS Cavalcade (Yale University), Professional Asset Management (Erasmus University), Mitsui Symposium on Labor and Finance (University of Michigan), and Western Finance Association (San Diego) conferences

Real Estate Shocks and Financial Advisor Misconduct

with Stephen Dimmock and Tyson Van Alfen

We test whether household wealth shocks affect professional misconduct by financial advisors. Using a novel panel containing all home addresses belonging to 434,447 advisors, we exploit within-advisor variation and show that advisors increase misconduct following declines in their homes' values. We find similar results in specifications that exploit variation in cumulative house price return, allowing us to limit the comparison to advisors living in the same ZIP code during the same year. We find evidence that the increase in misconduct is due to willful actions by advisors, such as unauthorized or excess trading, as well as neglect or distraction due to financial pressure.

Presented at NTU Finance, Western Finance Association (San Diego), and University of Washington Summer Finance conferences

The Importance of Family: The Role of Mutual Fund Family Reputation in Investment Decisions

with Laura Starks and Mike Yates

We examine the effect of investors’ prior experience with mutual fund families on their subsequent investment decisions. Using a sample from a large discount broker, we find that investors are significantly more likely to purchase funds from families with which they have previous experience. Our results are consistent with the influence of family-level reputation and robust to alternative explanations such as service quality, fee discounts, marketing, blind loyalty, or inertia. Further consistent with reputation theories, individuals' beliefs about more reputable families appear to change slowly. After experience-based purchases, investors earn higher returns even controlling for investor ability and within-family correlation.

Presented at the Professional Asset Management (Erasmus University), Financial Management Association, and Financial Management Association European conferences

Finance Publications

Is Fraud Contagious? Career Networks and Fraud by Financial Advisors

with Stephen Dimmock and Nathaniel Graham

Using a novel data set of U.S. financial advisors that includes individuals' employment histories and misconduct records, we show that co-workers influence an individual's propensity to commit financial misconduct. We identify co-workers' effect on misconduct using changes in co-workers caused by mergers of financial advisory firms. The tests include merger-firm fixed effects to exploit the variation in changes to co-workers across branches of the same firm. The probability of an advisor committing misconduct increases if his new co-workers, encountered in the merger, have a history of misconduct. This effect is stronger between demographically similar co-workers.

Hedge Fund Boards and the Market for Independent Directors

with Chris Clifford and Jesse Ellis

We provide the first examination of hedge fund boards and their directors. The majority of directorships are held by extremely busy independent directors. These directors are sought after by funds because they have more reputational capital at stake, making them independent and credible monitors whose presence can certify fund quality to investors. Busy independent directors are more likely to be hired by high quality funds, and their departure from the board is associated with investor withdrawals. Moreover, funds with busy independent directors are less likely to commit fraud, abuse discretionary liquidity restrictions, or engage in performance-based risk shifting.

Capital Gains Lock-In and Governance Choices

with Steve Dimmock, Zoran Ivkovich, and Scott Weisbenner

Differences in accrued gains and investors’ tax-sensitivity induce variation in a capital gains lock-in effect across mutual funds even for the same stock at the same time. Exploiting this variation, we show this effect influences funds’ governance decisions: higher capital gains decrease the likelihood a fund exits prior to contentious votes and increase the likelihood a fund votes against management. Consistent with tax motivation, these findings are concentrated among funds with tax-sensitive investors. Further, high aggregate capital gains across funds holding a stock predict a higher likelihood management loses a vote and a lower likelihood a contentious vote is proposed.

Regulatory Oversight and Return Misreporting by Hedge Funds

with Steve Dimmock

We use SEC rule changes to show that regulatory oversight reduces return misreporting by hedge funds. Specifically, we use a 2004 rule change that expanded SEC oversight of hedge funds and the 2006 revocation of this rule. Differences-in-differences tests show that, following the rule change, misreporting by newly regulated funds decreased. After revocation, funds that exited the regulatory system increased misreporting relative to funds that remained registered. Placebo tests show no change in misreporting by foreign funds exempt from the rule change. We show that regulatory oversight increased the level of flows and decreased the sensitivity of flows to underperformance.

What Determines the Allocation of Managerial Ownership within Firms?

with Steve Dimmock and Jennifer Marietta-Westberg

We show that the allocation of managerial ownership to individuals within firms varies depending upon the joint distribution of decision control and decision management rights. Using a unique dataset of institutional investment management firms, we show that ownership is higher for managers: with both executive and operational responsibilities; when benefits of cooperation are higher; and with large contributions to firm value. Consistent with career concerns, we find increases in a manager's ownership are associated with increases in unsystematic risk. Ownership dispersion within the firm is associated with the allocation of monitoring and operational roles and the potential benefits of cooperation.

Blockholder Ownership and Corporate Control: The Role of Liquidity

Employing an instrumental variable approach based on the regulatory change of tick sizes, I examine the link between the liquidity of a firm's equity and activism by large shareholders. I find that liquidity increases the likelihood of block formation. Blockholders of more liquid securities take smaller stakes that do not precommit them to monitor. I find evidence that the threat of exit from a block can discipline managers and that this threat is more effective when liquidity is higher. While liquidity increases exit from existing blocks, I find no evidence that share illiquidity forces blockholders to actively monitor.

Predicting Fraud by Investment Managers

with Steve Dimmock

We test the predictability of investment fraud using a panel of mandatory disclosures filed with the SEC. We find that disclosures related to past regulatory and legal violations, conflicts of interest, and monitoring have significant power to predict fraud. Avoiding the 5% of firms with the highest ex ante predicted fraud risk would allow an investor to avoid 29% of fraud cases and over 40% of the total dollar losses from fraud. We find no evidence that investors receive compensation for fraud risk through superior performance or lower fees. We examine the barriers to implementing fraud prediction models and suggest changes to the SEC's data access policies that could benefit investors.


How One Bad Employee Can Corrupt a Whole Team

with Stephen Dimmock

One bad apple, the saying goes, can ruin the bunch. So, too, with employees. Our research on the contagiousness of employee fraud tells us that even your most honest employees become more likely to commit misconduct if they work alongside a dishonest individual. And while it would be nice to think that the honest employees would prompt the dishonest employees to better choices, that’s rarely the case. Among co-workers, it appears easier to learn bad behavior than good.

Misconduct and Fraud by Investment Managers

with Steve Dimmock and Joe Farizo

We document the prevalence and variety of frauds committed by investment managers. We show that prior legal and regulatory violations, conflicts-of-interest, and monitoring disclosures available via the Security and Exchange Commission’s Form ADV are useful for predicting fraud. Additional tests show that fraud by rogue employees is more predictable than firm-wide fraud, but both types of fraud are significantly predictable. We revisit the fraud prediction model of Dimmock and Gerken (2012) and test its performance out-of-sample (using fraud cases discovered since that article’s publication). We find the model has significant predictive power for the out-of-sample cases. To encourage additional research in this area, we have made the data used in this chapter publicly available at https://doi.org/10.13023/nsjd-rk62.

Links between International Financial Markets and Volatility

with Kirt Butler

The international financial crisis of 2008 focused attention on linkages between international financial markets as the crisis quickly propagated across countries and markets. Understanding the extent of financial market contagion during crisis times requires identifying normal interdependence; that is, how markets move during normal times. Normal interdependence includes price and volatility spillovers that may arrive contemporaneously or with a delay. Once normal interdependence is recognized, financial contagion can be measured relative to this base as a cross-market change in the transmission channels—particularly in asset price comovements—after a shock in one market. This chapter surveys the evidence on the linkages between international financial markets in an effort to characterize understanding of normal interdependence and contagion.

Genetic algorithm for optimization and specification of a neuron model

with Luke Purvis and Rob Butera

We present a novel approach for neuron model specification using a genetic algorithm (GA) to develop simple firing neuron models consisting of a single compartment with one inward and one outward current. The GA not only chooses the model parameters, but also chooses the formulation of the ionic currents (i.e. single-state variable, two-state variable, instantaneous, or leak). The fitness function of the GA compares the frequency output of the GA-generated models to an I–F curve of a nominal Morris–Lecar (ML) model. Initially, several different classes of models compete within the population. Eventually, the GA converges to a population containing only ML-type firing models, that is, models with an instantaneous inward and single-state variable outward current. Simulations where ML-type models are restricted from the population are also investigated. This GA approach allows the exploration of a universe of feasible model classes that is less constrained by model formulation assumptions than traditional parameter estimation approaches.

Hybrid Integrate-and-Fire Model of a Bursting Neuron

with Barbara Breen and Rob Butera

We present a reduction of a Hodgkin-Huxley (HH)—style bursting model to a hybridized integrate-and-fire (IF) formalism based on a thorough bifurcation analysis of the neuron's dynamics. The model incorporates HH-style equations to evolve the subthreshold currents and includes IF mechanisms to characterize spike events and mediate interactions between the subthreshold and spiking currents. The hybrid IF model successfully reproduces the dynamic behavior and temporal characteristics of the full model over a wide range of activity, including bursting and tonic firing. Comparisons of timed computer simulations of the reduced model and the original model for both single neurons and moderate lysized networks (n = 500) show that this model offers improvement in computational speed over the HH-style bursting model.