## A new MM algorithm for constrained estimation in the proportional hazards model

- Jieli Ding, Guo-Liang Tian, Kam Chuen Yuen
- Computational Statistics & Data Analysis
- 2015

- Published 2000

The semiparametric proportional odds model for survival data is useful when mortality rates of different groups converge over time. However, fitting the model by maximum likelihood proves computationally cumbersome for large datasets because the number of parameters exceeds the number of uncensored