“…The most popular technique involves the use of worklife tables, originally published by the Bureau of Labor Statistics (Smith, 1982) and updated in a number of recent studies, to produce a fixed number of years of working life (Brookshire and Slesnick, 1997; Thornton and Slesnick, 1997). Other single figure approaches include simply taking years to retirement or the median/mean years to final separation (Bell and Taub, 1998; Ciecka et al , 1997; Schieren, 1993;). Two methods that involve year‐by‐year representations of labour force activity are those based upon the transition probabilities that feed into the worklife expectancy tables (Alter and Becker, 1985; 1987) and the use of unconditional year‐by‐year life, participation and employment probabilities (Brookshire and Cobb, 1983).…”