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New estimates of the hybrid US Phillips curve

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  • E32 - Business Fluctuations
  • Cycles
  • E31 - Price Level
  • Inflation
  • Deflation
  • Mathematics


This paper examines the validity of Rudd and Whelan’s (2006) critiques of Gali and Gertler’s (1999) hybrid Phillips curve (HYPC) by re-estimating the HYPC using full information maximum likelihood (FIML). We also estimate HYPC with the constraint that the weights for the sum of forward looking and backward looking expectations should be unity. Our results support Rudd and Whelan’s conclusion that the weight for forward looking expectations is insignificant.

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