The Granger-causal relationship between the size and dispersion of fluctuations in sub-components of the U.S. Consumer Price Index (CPI) is examined using both in-sample and post- sample tests and data from January 1968 to December 2008. Strong in-sample evidence is found for feedback between...

The Granger-causal relationship between the size and dispersion of fluctuations in sub-components of the US Consumer Price Index (CPI) is examined using both in-sample and out-of-sample tests and data from January 1968 to December 2008. Strong in-sample evidence is found for feedback between...