This paper develops a dynamic labor supply model based on unstable bandwagon and habit effects. It possesses multiple long-run equilibria and exhibits hysteresis and transitions between home and market time dependent on the wage rate. These properties are robust. The model provides an explanation of the long-run increase in labor supply by married women in the Netherlands, the USA and other OECD countries. (C) 1998 Elsevier Science B.V. All rights reserved.