Publications:

• Vacancy posting, Job Separation and Unemployment Fluctuations, Journal of Economic Dynamics and Control, Forthcoming
  Featured in The New Republic

• Productivity and Unemployment over the Business Cycle, Appendix, Journal of Monetary Economics, Nov 2010.
  

• Building a composite Help-Wanted Index, Economics Letters, Dec 2010.
  Data, updated 2012m02: Composite Help-Wanted Index

• The Optimal Level of Reserves for Low-Income Countries: Self-Insurance against External Shocks, IMF Staff Papers, 56(4), 2009.
  (older version: IMF Working Paper, WP/08/149, 2008)
  

• Sources of Inflation in Sub-Saharan Africa (joint with Shanaka Peiris (IMF)), Journal of African Economies, 17(5), 2008.
  (older version: IMF Working Paper, WP/07/32, 2007)

 Working Papers:

• The Determinants of the Cycles and Trends in US Unemployment, Appendix (with A. Figura), NEW May 2012
  (formally circulated under the title "What drives movements in the unemployment rate")

• Using Labor Force Flows to Forecast the Labor Market, (with C. Nekarda), NEW January 2012
  

•  Labor Market Heterogeneities, Matching Efficiency and the Cyclical Behavior of the Job finding Rate, Appendix (with A. Figura), December 2011
  (formally circulated under the title "What drives movements in matching efficiency")
  

• Which Industries are Shifting the Beveridge Curve?, (with M. Elsby, B. Hobijn and A. Sahin), December 2010
  

•  The Lumpy Job Separation Rate: Reconciling Search Models with the Ins and Outs of Unemployment, Appendix B, October 2010
  

•  The Shimer puzzle and the Endogeneity of Productivity, March 2011
  (older version: FEDS Working Paper 2009-04).
  

•  Fiscal Policy and Deficit Bias with Non-Educated (or Naive) Agents, Working Paper, 2004