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Research Finds Adding Women to a Bank’s Board of Directors Increases Institutional Performance and Outcomes

Research Shows Positive Effects Of Gender Diversity In Bank Boards
Ray FitzGerald

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Ray Fitzgerald has more than a decade of journalism experience, writing for national media outlets, including the Miami Herald and Investment Times. Ray is passionate about traditional and alternative investment strategies, but most enjoys sharing creative ways to budget and save money. Ray has personally written about hundreds of credit card offers from banks and credit unions across America and enjoys helping people find the best cards and rewards programs for their specific spending needs.

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Ashley Fricker

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Ashley Fricker has more than a decade of experience as a finance contributor and editor, and has specialized in the credit card industry since 2015. Her credit card commentary is featured on national media outlets that include CNBC, MarketWatch, Investopedia, and Reader's Digest, among many others. She has worked closely with the world’s largest banks and financial institutions, up-and-coming fintech companies, and press and news outlets to curate comprehensive content and media. Ashley holds a bachelor's degree in multimedia journalism from Florida Atlantic University.

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Advertiser Disclosure

In a Nutshell: Several studies on the effects of gender diversity on boards of directors returned results that were too wide-ranging to be conclusive. But recent research by Ann Owen, Professor of Economics at Hamilton College, and Judit Temesvary a senior economist at the Federal Reserve Board of Governors, attempts to reconcile previous other findings by using alternative research methods. Their research paper found that the impact of increasing gender diversity on a board of directors is dependent upon the number of women already on the board and the bank’s level of capitalization. The study is the first of its kind to provide evidence showing that well-capitalized institutions are better able to reap the benefits of diverse perspectives on their boards. //

For decades, banks and similar financial service providers have lagged behind other industries in terms of the gender diversity of their executives and boards of directors.

The effects of greater female participation on boards of directors with respect to the success of the institutions they lead varied widely, according to early research. Some studies found improved financial performance while others claimed negative or no impact.

Headshot of Ann Owen, Henry Platt Bristol Professor of Economics at Hamilton College

Ann Owen is the Henry Platt Bristol Professor of Economics at Hamilton College.

But Ann Owen, a Professor of Economics at Hamilton College, used different research methods in a study she co-authored with Judit Temesvary.

The research paper focuses on efficiency and profitability at 90 US bank holding companies from 1999 to 2015 and found that the impact of increasing gender diversity on the board of directors is context dependent.

“There are two conditions in which adding another woman to your board of directors would improve your performance,” Owen said. “One of the conditions is that she can’t be the first woman. There needs to be more than one woman in the room in order for this positive effect to happen. The second condition is the bank needs to be well managed.”

Owen and Temesvary applied the instrumental variables method to the data, which estimates causal relationships when controlled experiments cannot be conducted.

“Instrumental variables is a statistical technique that allows us to claim that the direction of causation goes from gender diversity to the return on assets,” Owen said.

Well-Managed Banks Benefit Most from Gender Diversity

“We are taking the term well-capitalized as meaning a bank is well-managed,” Owen said. “We’re using the risk-weighted capital ratio and using it as a proxy for the quality of management.”

The study found that well-managed banks don’t reap the benefits of gender diversity until the share of women on their boards reaches around 17%.

“Adding more women also adds more experiences, backgrounds, expertise, and skills,” Owen said. “When you’re thinking about making decisions, you want to have a mix of skills in the room. One of the things our research supports is that having a variety of experiences and perspectives in the room helps to improve those outcomes.”

Recently, banks have seen an improvement in gender diversity, with the number of women CEOs increasing from 2.1% in 2014 to 6.3% in 2017. The authors’ findings suggest the continued voluntary expansion of gender diversity in banks is likely to bring overall performance benefits, including a higher return on assets.

More than One Woman is Needed to Reach the Full Potential

Perhaps Owen and Temesvary’s most concrete conclusion showed the biggest return banks gain from gender diversity is achieved once a threshold of female participation is reached.

While the study put that participation number around 17% of board membership, Owen said that, when considering the size of most boards, the number of women needed to cause change isn’t very large.

“Once you cross the threshold and have a certain percentage of women in the room, the effect becomes positive,” Owen said. “Factoring the size of most bank boards, that means two women. One doesn’t cross the threshold, but two does.”

Owen said one of the largest hurdles in conducting the research was determining the cause-and-effect of board makeup on things like return on assets.

“Once you cross the threshold and have a certain percentage of women in the room, the effect of increased gender diversity becomes positive.” — Ann Owen, Professor of Economics at Hamilton College

“You could also make a case that the causation runs the other way,” Owen said. “When return on assets is low, there’s a board shakeup and the mix of board members changes. We find this correlation and we’re worried about interpreting which direction the causation goes.”

How Banks Mitigate Costs and Reap Benefits from Diversity

Owen noted that increased diversity on a bank’s board is not a quick fix and does have potential pitfalls along the way.

“The idea here is that, when you increase diversity, there are costs and benefits,” she said. “The cost is a greater potential for conflict or trouble with coordination.”

Owen said well-managed banks are better prepared to mitigate the cost factor and reap the benefits of gender diversity based on a stronger corporate structure and support system.

“The benefit is that you’ll get a more diverse perspective in the room in order to improve decision-making and the advice the board of directors gives to management,” Owen said.

Owen and Temesvary’s findings attempt to reconcile the results of previous researchers whose studies show a wide range of potential impacts, both negative and positive, on gender diversity on bank boards. By taking a larger dataset and using alternative research methods, they were able to show the positive correlation between diversity and improved performance when more than one woman is present on a board and the bank is well-managed.

“Our study looks broadly at these trends,” Owen said. “The subject of further research will look at why this happens.”

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