Permanent disability and social security

Research output: Contribution to journalArticlepeer-review


A Markov chain approach is used to estimate the probability of a man covered by Portuguese Social Security becoming permanently disabled. This estimator is used to assess the contribution of each active man covered by the Portuguese Social Security to insure against that possibility. This prediction is necessary due to the pay-as-you-go system used.
Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalBiometrical Letters
Issue number1
Publication statusPublished - 1 Jan 2006


  • Pay-as-you-go
  • permanently disabled
  • prediction of yearly contributions


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