Template-Type: ReDIF-Paper 1.0 Author-Name: Mirko Abbritti Author-X-Name-First: Mirko Author-X-Name-Last: Abbritti Author-Email: abbritt3@hei.unige.ch Author-Workplace-Name: Graduate Institute of International Studies, Geneva Author-Name: Andrea Boitani Author-X-Name-First: Andrea Author-X-Name-Last: Boitani Author-Email: andrea.boitani@unicatt.it Author-Workplace-Name: DISCE, Università Cattolica, Milan Author-Name: Mirella Damiani Author-X-Name-First: Mirella Author-X-Name-Last: Damiani Author-Email: mirelladamiani@libero.it Author-Workplace-Name: Università di Perugia Title: Labour market imperfections, "divine coincidence" and the volatility of employment and inflation Abstract: The dynamic general equilibrium model with hiring costs presented in this paper delivers involuntary unemployment in the steady state as well as involuntary fluctuations in unemployment. The existence of hiring friction introduces externalities that, in turn, entail the breakdown of the "divine coincidence" without assuming real wage rigidity. Our model with labour market imperfections outperforms the standard NK model as for the persistence of responses to monetary shocks. The model also allows for an analysis of the volatility of economies, differing in their "degrees of labour market rigidity". It turns out that "rigid" economies exhibit less unemployment volatility and more inflation volatility than "flexible" economies. Length: nn pages 39 Creation-Date: 2008-04 File-URL: http://www.unicatt.it/Istituti/EconomiaFinanza/Quaderni/ief0078.pdf File-Format: Application/pdf File-Function: First version, 2008 Number: ief0078 Classification-JEL: E24, E31, E32, E52, J64 Keywords: Hiring Costs, Wage Bargaining, Output Gap, New Keynesian Phillips Curve Handle: RePEc:ctc:serie3:ief0078