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A Fractional Survival Model

Cheng K. Lee, Jenq-Daw Lee

math.STarXiv:math/0612295

Abstract

A survival model is derived from the exponential function using the concept of fractional differentiation. The hazard function of the proposed model generates various shapes of curves including increasing, increasing-constant-increasing, increasing-decreasing-increasing, and so-called bathtub hazard curve. The model also contains a parameter that is the maximum of the survival time.

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