Credibility study
\ˌkrɛdəˈbɪlɪti\ \ˈstʌdi\
An experience analysis of a population's historical longevity data used to adjust a prior mortality assumption (for example, a traditional table or multi-factor model such as VitaCurves) to bring it more in line with a population’s observed experience.
Credibility theory is used to assess the statistical significance of any difference between the experience data set and the data underlying the prior assumption. This often leads to only partial recognition of any difference in experience when setting assumptions.
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