1. Structural/frictional vs. deficient demand unemployment: some new evidence;Abraham;American Economic Review,1983
2. Cyclical unemployment: sectoral shifts or aggregate disturbances?;Abraham;Journal of Political Economy,1987
3. Vacancy posting, job separation and unemployment fluctuations;Barnichon,2009
4. The Beveridge curve;Blanchard,1989
5. Five facts you need to know about technology diffusion;Comin,2006