How much did the liberty shipbuilders forget?

This paper produces new estimates of the rate of organizational forgetting in the well-known case study of U.S. wartime ship production. Estimates obtained using data constructed from primary sources at the National Archives yield rates of forgetting that are much smaller than previously reported, and may well be zero. The richness of the data makes it possible to control for variations in the product mix, to explore alternative formulations for the learning curve, and to investigate the relationship between organizational forgetting and labor turnover.