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ESTIMATION OF CHANGE POINTS IN HAZARD RATES
Keywords:
hazard rate, life table, segmented regression, quadratic hazard rate model.DOI:
https://doi.org/10.17654/0972361722028Abstract
Class of distributions that arise naturally in the human mortality study and reliability situations is characterized by “bathtub shaped” failure rate functions. In this study, the life table of different populations is considered and studied. Hazard rate at various ages of human life cycle and change points of hazard rate are estimated by quadratic hazard rate model using mortality index of life tables for populations under consideration. It is noted that some of the considered high-income category countries (have only one breakpoint in hazard curve) possess a single breakpoint whereas some of the countries fitted with two breakpoints, which are because of high infant mortality rates.
Received: December 18, 2021
Accepted: March 2, 2022
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