“The choice between solidary and flexible pension schemes hinges mainly on customization: lacking customization has larger welfare effects for participants than borrowing constraints.”

 

What is the focus of the paper?

This paper analyzes the choice between the solidary defined contribution scheme (SPR) and the flexible defined contribution scheme (FPR) in the Dutch pension system. The core question is whether the ability to borrow in the SPR or the (practical) ability to tailor investment strategies to personal risk-aversion level in the FPR is more important for pension outcomes of participants. The authors use a stylized economic model and Monte Carlo simulations of the accumulation phase. Outcomes for participants with different risk preferences are compared to an optimal benchmark without borrowing constraints and with perfect customization. The analysis focuses solely on the accumulation phase and excludes institutional features such as solidarity reserves.

 

What are the key findings?

The results show that borrowing constraints mainly affect participants with high risk tolerance, but their overall welfare impact is limited relative to misspecification of risk tolerance. In contrast, a lack of customization in investment strategies leads to substantially larger welfare losses, especially for participants whose risk preferences differ strongly from the average. The SPR tends to be relatively attractive for the “average” participant, while the FPR better serves participants who prefer either more or less risk. Across multiple economic scenarios, the central conclusion remains robust: the welfare loss of a one size fits all strategy exceeds that of borrowing restrictions in a plan tailored to the risk preferences of the individual.

 

What are the implications?

  • Designing pension schemes should prioritize customization of risk exposure, as mismatches have significant welfare consequences.
  • Borrowing constraints reduce both risk and potential returns by restricting leveraged investments, but generally cause only moderate welfare losses.
  • Social partners and pension providers need clear communication to help participants understand these trade offs and make informed choices.