The maximum likelihood estimator (MLE) for the survival function S-T under
the proportional hazards model of censorship is derived and shown to differ
from the Abdushukurov-Cheng-Lin estimator when the class of allowable dist
ributions includes all continuous and discrete distributions. The estimator
s are compared via an example. The MLE is calculated using a Newton-Raphson
iterative procedure and implemented via a FORTRAN algorithm.