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by Marleen Dieleman, Camellia Pham Published November 19, 2024 in Brain Circuits • 3 min read
Do you:
a. Interpret the data as aligned with your strategic choices;
b. Threaten to fire the entire product-testing team unless they produce acceptable results; or
c. Order further trials to test your strategy?
Do you:
a. Say that investment in a backup plan is a waste of resources;
b. Reply that plan Bs are for those who shouldn’t be on the A team; or
c. Slap the newbie on the back and put them in charge of contingency planning?
Do you:
a. Double down on expansion plans, because uncertainty means opportunity;
b. Dial the command-and-control button up to 11, because tough times call for tough talk; or
c. Re-examine your strategy and try to mitigate the risks involved?
Mostly As: You are definitely erring on the side of overconfidence. While this can be a useful – and even necessary – trait in leaders, it can lead to problems, particularly if things are not going to plan or the business is hit by a downturn.
Mostly Bs: This is not overconfidence – it is egomania. You need to learn how to put the interests of others, including every stakeholder in the company, ahead of your personal agenda.
Mostly Cs: You’re leading with calm authority and appropriate confidence. Keep up the good work!
Overconfidence is not always a bad thing in a leader. In fact, recent research suggests that overconfident CEOs are associated with better firm performance; exactly because of their willingness to take risks.
But overconfidence in cyclical and volatile markets is dangerous. There are two scenarios in particular where overconfidence can lead to a company’s downfall: inexperienced executives during market expansion, and experienced executives during a downturn.
Leadership biases are amplified in unpredictable markets and when executives enjoy more power. To protect against this risk, companies need to put checks and balances in place. Top execs should also be encouraged to practice ‘metacognition’ – systematically thinking about how to think. Practicing this can be a powerful tool to help leaders combat their biases, prevent overconfidence, and future-proof their companies.

Peter Lorange Family Business Professor
Marleen Dieleman is an expert on business families, especially in Asia. Her research focuses on the governance, strategy, internationalization, and transformation of business families in emerging markets. She has won multiple awards for her teaching and for her teaching cases. Dieleman’s thought leadership on family business led to her inclusion in the global Thinkers50 Radar class in 2026. She co-founded the family business chapter at the Singapore Institute of Directors where she advocates for strengthening the governance practices of family businesses boards. At IMD, she directs Future-Proofing your Business Family, is co-director of Orchestrating Winning Performance, and she works closely with individual business families in Asia on governance and succession mandates.

Research assistant at IMD
Camellia Pham is a research assistant at IMD and an undergraduate student at the National University of Singapore pursuing a Bachelor of Business Administration degree, specializing in Finance and Business Analytics.

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