Likelihood Calculations for Matched Case-Control Studies and Survival Studies with Tied Death Times
提出一种递归算法，可快速计算匹配病例对照研究和有并列死亡时间的生存研究中的条件似然函数，并通过含7个参数、10个大层的实例验证了条件最大似然解的可行性。
A recursion is presented which permits rapid computation of a conditional likelihood function which arises in matched case-control studies and survival studies with tied death times. An example with seven parameters and ten large strata, the largest of which contains 29 cases and 52 controls, illustrates the feasibility of the conditional maximum likelihood solution. These methods may be specialized to permit rapid calculation of the conditional maximum likelihood estimate of the common odds ratio for several 2×2 tables.