Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/29969
Authors: 
Scheufele, Rolf
Year of Publication: 
2008
Series/Report no.: 
IWH Discussion Papers 10/2008
Abstract: 
This paper evaluates the New Keynesian Phillips Curve (NKPC) and its hybrid variant within a limited information framework for Germany. The main interest rests on the average frequency of price re-optimization of firms. We use the labor income share as the driving variable and consider a source of real rigidity by allowing for a fixed firm-specific capital stock. A GMM estimation strategy is employed as well as an identification robust method that is based upon the Anderson-Rubin statistic. We find out that the German Phillips Curve is purely forward looking. Moreover, our point estimates are consistent with the view that firms re-optimize prices every two to three quarters. While these estimates seem plausible from an economic point of view, the uncertainties around these estimates are very large and also consistent with perfect nominal price rigidity where firms never re-optimize prices. This analysis also offers some explanations why previous results for the German NKPC based on GMM differ considerably. First, standard GMM results are very sensitive to the way how orthogonality conditions are formulated. Additionally, model misspecifications may be left undetected by conventional J tests. Taken together, this analysis points out the need for identification robust methods to get reliable estimates for the NKPC.
Subjects: 
Inflation dynamics
Phillips Curve
Weak Instruments
Optimal Instruments
JEL: 
E31
C13
C52
Persistent Identifier of the first edition: 
Document Type: 
Working Paper

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