A structural model of trade union behaviour under uncertainty, with sticky wage.

trade union concern for job security is modelled under asymmetric information about labour demand, with rigid wage. Sequential decision processe are discussed: for the individual, on whether to join the union; for the union, about the contribution to charge; for the employer, on the level of labour to hire. Equilibrium and "disequilibrium" solutions with shocked output price are provided in a general and algebraic formulation. Simulations with 1982 British data are shown, with shocks on probability of fall in output price, on technology, and on working time.