This chapter assesses how models with search frictions have shaped our understanding of aggregatelabor market outcomes in two contexts: business cycle fluctuations and long-run (trend) changes. Wefirst consolidate data on aggregate labor market outcomes for a large set of OECD countries. We...

Much recent research has focused on the development and analysis of extensions of the New Keynesianframework that model labor market frictions and unemployment explicitly. The present paper describessome of the essential ingredients and properties of those models, and their implications for...