@techreport{NBERw13777, title = "Marginal Jobs, Heterogeneous Firms, & Unemployment Flows", author = "Michael W. L. Elsby and Ryan Michaels", institution = "National Bureau of Economic Research", type = "Working Paper", series = "Working Paper Series", number = "13777", year = "2008", month = "February", URL = "http://www.nber.org/papers/w13777", abstract = {This paper introduces a notion of fir m size into a search and matching model with endogenous job destruction. The outcome is a rich, yet analytically tractable framework that can be used to analyze a broad set of features of both the cross section and the dynamics of the aggregate labor market. In a set of quantitative applications we show that the model can provide a coherent account of a) the salient features of the distributions of employer size, and employment growth across establishments; b) the amplitude and propagation of cyclical fluctuations in flows between employment and unemployment; c) the negative comovement of unemployment and vacancies in the form of the Beveridge curve; and d) the dynamics of the distribution of employer size over the business cycle.}, }