This work analyses pension system sustainability in the light of a new methodology (Angrisani, The logical sustainability of the pension system, 2008), which pertains to defined contribution pension systems provided with a funded component. A necessary and sufficient condition of the sustainability obtained in this methodological context is illustrated numerically. As regards sustainability our results show the key role of a specific variable of state, namely the level of unfunded contribution rate, whose definition is strictly connected to the part of pension liability that is not covered by system assets.
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