David Laibson, Marie Brière en Stefan Zeisberger

 

“Pensioen & Wetenschap” is a podcast by Netspar: the knowledge network connecting academia with the pension and insurance sector. Today, Stefan Zeisberger, chair of this year’s International Pension Workshop (IPW) program committee, engages in conversation with the two keynote speakers of the IPW. 

In this episode of the Netspar podcast, we explore what an optimal pension system should look like, drawing on key insights and experiences from the retirement systems of the United States and France. Featured guests Marie Brière (Head of Investor Intelligence & Academic Partnerships at Amundi Investment Institute and Managing Director of Institut Louis Bachelier) and David Laibson (Professor of Economics at Harvard University) utilize their recent academic research to uncover the structural differences and inherent vulnerabilities of both models. While the French approach focuses heavily on collective solidarity through a pay-as-you-go framework, the American system relies more on individual capitalization via 401(k) plans. Both systems exhibit clear drawbacks, ranging from systemic demographic sustainability challenges in Europe to a lack of broad-based and persistent defined contribution wealth formation for citizens in the US. 

The central question is how these behavioral and structural insights can guide us toward a more robust pension design. Brière and Laibson outline concrete recommendations for an optimal framework where the benefits of collectivism and individual flexibility reinforce one another. Crucially, recent insights reveal that earlier academic literature advocating for powerful “nudges” is not as straightforward as previously thought, and the effects are sometimes much smaller than anticipated. Ultimately, because individuals struggle with behavioral biases when making long-term, complex financial decisions, Brière and Laibson argue that smart defaults and digital decision tools must very likely be paired with well-designed mandatory elements to effectively secure retirement outcomes.

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