Fast Micro and Slow Macro: Can Aggregation Explain the Persistence of Inflation?

39 Pages Posted: 20 Feb 2007

See all articles by Benoit Mojon

Benoit Mojon

Banque de France

Paolo Zaffaroni

Imperial College Business School

Filippo Altissimo

Brevan Howard Asset Management LLP

Multiple version iconThere are 2 versions of this paper

Date Written: February 2007

Abstract

An aggregation exercise is proposed that aims at investigating whether the fast average adjustment of the disaggregate inflation series of the euro area CPI translates into the slow adjustment of euro area aggregate inflation. We first estimate a dynamic factor model for 404 inflation sub-indices of the euro area CPI. This allows to decompose the dynamics of inflation sub-indices in two parts: one due to a common macroeconomic shock and one due to sector specific idiosyncratic shocks. Although idiosyncratic shocks dominate the variance of sectoral prices, one common factor, which accounts for 30 percent of the overall variance of the 404 disaggregate inflation series, is the main driver of aggregate dynamics. In addition, the heterogenous propagation of this common shock across sectoral inflation rates, and in particular its slow propagation to inflation rates of services, generates the persistence of aggregate inflation. We conclude that the aggregation process explains a fair amount of aggregate inflation persistence.

Keywords: Inflation dynamics, aggregation and persistence, euro area

JEL Classification: E31, E32

Suggested Citation

Mojon, Benoit and Zaffaroni, Paolo and Altissimo, Filippo, Fast Micro and Slow Macro: Can Aggregation Explain the Persistence of Inflation? (February 2007). ECB Working Paper No. 729. Available at SSRN: https://ssrn.com/abstract=962034

Benoit Mojon (Contact Author)

Banque de France ( email )

Paris
France

Paolo Zaffaroni

Imperial College Business School ( email )

South Kensington Campus
Exhibition Road
London SW7 2AZ, SW7 2AZ
United Kingdom

Filippo Altissimo

Brevan Howard Asset Management LLP ( email )

2nd Floor Almack House
28 King Street
London, SW1Y 6XA
United Kingdom

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