In this paper I incorporate group behaviour into a model of the labour
market and show that discrimination can be the result of competition
between coalitions of workers and bosses for jobs. If the probability
of correctly assessing the productivity of individual workers decrease
s, coalition formation on the basis of recognisable characteristics be
comes relatively more rewarding than coalition forming on the basis of
productivity. The conditions are under which each individual in the e
ndogeneously defined group actively discriminates persons with differe
nt recognisable characteristics, independent of productivity. (C) 1998
Elsevier Science B.V. All rights reserved. JEL classification: C72; C
73; D74; 361; 571.