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Citation Information : Statistics in Transition New Series. Volume 22, Issue 3, Pages 31-57, DOI: https://doi.org/10.21307/stattrans-2021-026
License : (CC BY-NC-ND 4.0)
Received Date : 21-November-2019 / Accepted: 13-April-2021 / Published Online: 05-September-2021
The paper deals with a new fuzzy version of the Lee-Carter (LC) mortality model, in which mortality rates as well as parameters of the LC model are treated as triangular fuzzy numbers. As a starting point, the fuzzy Koissi-Shapiro (KS) approach is recalled. Based on this approach, a new fuzzy mortality model – CNMM – is formulated using orthonormal expansions of the inverse exponential membership functions of the model components. The paper includes numerical findings based on a case study with the use of the new mortality model compared to the results obtained with the standard LC model.
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