Unit Roots in Inflation and Aggregation Bias
AbstractIn this paper, we examine whether UK inflation is characterized by aggregation bias using three sets of increasingly disaggregated inflation data and a battery of univariate and panel unit root tests. Our results support the existence of aggregation bias since while the unit root hypothesis cannot be rejected for aggregate inflation, it can be rejected for some of its sectoral components, with the rejection frequencies increasing when we use more disaggregate data. Results from structural break analysis indicate that monetary policy shifts are the main factor behind breaks in UK inflation. The panel results typically indicate that when sectoral inflation rates are pooled the unit root hypothesis can be rejected. Our results have important implications for applied econometric analysis, macroeconomic theory and for the conduct of monetary policy.
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Bibliographic InfoPaper provided by Business School - Economics, University of Glasgow in its series Working Papers with number 2007_07.
Date of creation: May 2007
Date of revision:
Inflation; Unit Root; Disaggregation; Structural Breaks; Panel Data;
Find related papers by JEL classification:
- C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models
- C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Longitudinal Data; Spatial Time Series
- E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
This paper has been announced in the following NEP Reports:
- NEP-ALL-2007-05-26 (All new papers)
- NEP-CBA-2007-05-26 (Central Banking)
- NEP-ECM-2007-05-26 (Econometrics)
- NEP-MAC-2007-05-26 (Macroeconomics)
- NEP-MON-2007-05-26 (Monetary Economics)
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