"In populations where higher proportions are surviving longer, cohort life tables are a valuable means of measuring changes and anticipating future developments. Yet cohort life tables are calculated only infrequently from national mortality statistics because of difficulties in adjusting observed data and projecting cohort survival. To facilitate regular updating, an approach to cohort life table construction is needed that circumvents the problems of data adjustment and projection. This paper proposes a method based on model life tables which provides information consistent with official life tables and projections of life expectancy. The paper also compares the results with those obtained by other methods and discusses some implications of trends in cohort survival." (SUMMARY IN ITA AND FRE)