Asymmetric Cycles

I estimate a model in which new technology entails random adjustment needs. Rapid adjustments may cause measured productivity to decline. The slow-downs persist because adjustment is costly, and hence protracted. The model explains both the "steepness" and the "deepness" asymmetry of cycles. Adjustment costs amount to about 14% of output and technological inefficiency to about 28%. Firms abandon technologies long before they are perfected-current practice total factor productivity (TFP) is 20% below its maximal level. Copyright 2006 The Review of Economic Studies Limited.