This paper supplements a learning-by-doing real busi-ness cycle model with endogenous organizational for-getting. Empirical evidence shows that the accumulatedexperience decay rate is not constant over the busi-ness cycle, but that forgetting is a function of economicactivity. Learning reinforces the effects of productivityshocks, and organizational forgetting exacerbates theirimpact and increases their persistence. This is of partic-ular interest when a negative productivity shock hits theeconomy,astheincreasingspeedofforgettingaggravatesthe negative shock and delays recovery.
