Labor Market Participation, Unemployment and Monetary Policy Staff Working Paper 2014-9 Alessia Campolmi, Stefano Gnocchi We incorporate a participation decision in a standard New Keynesian model with matching frictions and show that treating the labor force as constant leads to incorrect evaluation of alternative policies. Content Type(s): Staff research, Staff working papers Topic(s): Business fluctuations and cycles, Labour markets, Monetary policy transmission JEL Code(s): E, E2, E24, E3, E32, E5, E52