Boldrin, MicheleDolado, Juan JoséJimeno, Juan F.Peracchi, FrancoUniversidad Carlos III de Madrid. Departamento de Economía2009-12-172009-12-171999-072340-5031https://hdl.handle.net/10016/6153In this paper we examine and ultimately challenge the traditional viewpoint on the future of current pension systems in Europe, according to which the effects of the ageing bomb will inevitably bring down our unfunded PA YG public pension systems. First, we claim that the projected dramatic increase in the pension burden in mostly due to labour market problems and the generosity of the system, rather than to demographic factors. Secondly, we conclude that a fully funded system cannot be achieved without a substantial reduction in current pension payments unless it is financed by issuing earnmarked public debt. Finally we claim that a socially efficient pension system should be a mixed one, partly funded and partly PA VG, on the basis of optimal portfolio allocation in a context of uncertain returns to both human and physical capital and on the role ofPAYG for financing the accumulation of human capital.application/pdfengAtribución-NoComercial-SinDerivadas 3.0 EspañaPension systemsFunded and unfunded systemsHuman and physical capital accumulationworking paperEconomíaopen access