An Investigation of the Pay-As-You-Go Financing Method Using a Contingency Fund and Optimal Control Techniques

Steven Haberman and Alexandros Zimbidis

North American Actuarial Journal, 2002, vol. 6, issue 2, 60-75

Abstract: In many countries, aging populations are expected to lead to substantial rises in the cost of public pension systems financed by the pay-as-you-go (PAYGO) method. These systems will need to be adapted to cope with these changes. This paper considers one approach to reform, described in the literature as “parametric” (see, e.g., Disney 2000), and develops a model for adapting the PAYGO method using a contingency fund and optimal control techniques. The solution of the original model is investigated within two different frameworks: a deterministic-continuous one and a stochastic-discrete one. Finally, a case study applied to Greece is discussed, leading to a potentially acceptable proposal of a smooth path for contribution rates and the age of eligibility for the normal retirement pension.

Date: 2002
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DOI: 10.1080/10920277.2002.10596044

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