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The hazard function (age-specific failure rate) is taken to be a function of the explanatory variables and unknown regression coefficients multiplied by an arbitrary and unknown function of time. A conditional likelihood is obtained, leading to inferences about the unknown regression coefficients. Some generalizations are outlined.<\/jats:p>","DOI":"10.1111\/j.2517-6161.1972.tb00899.x","type":"journal-article","created":{"date-parts":[[2018,12,7]],"date-time":"2018-12-07T00:22:29Z","timestamp":1544142149000},"page":"187-202","source":"Crossref","is-referenced-by-count":37329,"title":["Regression Models and Life-Tables"],"prefix":"10.1093","volume":"34","author":[{"given":"D. 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