37 (September), pp. 1–18. Moreover, recent research has highlighted the challenges that swings in the labor share have presented for the interpretation of inflation developments (for example, Marco Del Negro, Marc P. Giannoni, and Frank Schorfheide (2014), “Inflation in the Great Recession and New Keynesian Models”, NBER Working Paper Series 20055 (Cambridge, Mass. : National Bureau of Economic Research, April)).
17  See Glenn D. Rudebusch and John C. Williams (2014), “A Wedge in the Dual Mandate: Monetary Policy and Long-Term Unemployment (PDF)”, Working Paper Series 2014–14 (San Francisco: Federal Reserve Bank of San Francisco, May). 18  For example, see Alan B. Krueger, Judd Cramer, and David Cho (2014), “Are the Long-Term Unemployed on the Margins of the Labor Market?