This paper constructs a simple, imperfectly competitive macro model which may have single or multiple equilibria depending on whether there are constant or increasing returns to scale in production. The model can be estimated and so can be used not only to test multiple versus single equilibrium...

In this paper we present an investigation of unemployment persistence in Japan, the United States and fourteen European economies. We concentrate on the sources of slow adjustment in the labour market, such as sluggishness in labour demand and persistence in the employment and wage targets of...