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Abstract
A 1962 recipient of a Ph.D. was an average of 10.13 years from receipt of a B.A.; a 1992 recipient was an average of 12.55 years. Some authors have suggested that if the B.A.‐year cohorts were compared instead of the Ph.D.‐year cohorts, the average time to earn a Ph.D. would not show such a drastic increase. The author recognizes the problem with the Ph.D.‐year data, but uses these data with a standardization‐decomposition technique to show that 75 per cent of the increase in the time between the B.A. and the Ph.D. in 1992 was due to the change in the age‐sex structure of Ph.D. recipients in favor of more women and older persons.