We discuss the effects of unions on steady-state multiplicity and welfare, and on the existence of endogenous fluctuations. We consider an OG economy with productive capital externalities and we focus on underemployment equilibria. We find that for wide regions in the parameter space, including...

We discuss the effects of unions in the labour market on steady-state multiplicity and welfare, and on the occurrence of local indeterminacy, local bifurcations and (stochastic and deterministic) endogenous fluctuations driven by self-fulfilling expectations. We consider an overlapping...