Retraining and long-term unemployment in a model of unlearning by not doing

This paper develops a dynamically consistent model of search, matching and bargaining when worker skills decline while unemployed. Long-term unemploym ent emerges as an endogenous phenomenon Even with constant returns to match ing. multiple Pareto rankable equilibria are possible. Policies to address long-term unemployment are best directed toward prevention (e.g. vacancy cr eation subsidies) rather than cure (e.g. retraining subsidies). (C) 2000 El sevier Science B.V. All rights reserved. JEL classification: J41, J24.