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Published in: Journal of Economic Interaction and Coordination 4/2020

21-11-2019 | Regular Article

Quantifying the risk of price fluctuations based on weighted Granger causality networks of consumer price indices: evidence from G7 countries

Authors: Qingru Sun, Xiangyun Gao, Ze Wang, Siyao Liu, Sui Guo, Yang Li

Published in: Journal of Economic Interaction and Coordination | Issue 4/2020

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Abstract

The consumer price index (CPI) is the weighted average of a basket of subcategories (CPI classes) and is the most widely adopted indicator in analyzing the risk of inflation or deflation. However, CPI classes contain more risk information. The CPI classes and the transmission of price fluctuations among them form a price index system. By using the CPI classes of the G7 countries, we explored the evolution of the fluctuation–transmission relationships among CPI classes and constructed weighted Granger causality networks (WGCNs) for each country. We measured the price fluctuation risk of the price index system in the G7 countries by using system risk entropy and revealed the structure of the systems from four perspectives: out-degree, clustering coefficient, correlation degree between CPI classes and the survival ratio of the Granger causality. We found the following trends. (1) The system risk entropy changed over time. After the 2008 financial crisis, the price fluctuation risk in the price index system increased. (2) The identified CPI classes with large out-degrees are vital in monitoring the fluctuations of commodities prices. (3) The stability of the Granger causality among CPI classes decreased as the time span increased, and the structure of most WGCNs was completely different after 2 years.

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Appendix
Available only for authorised users
Footnotes
1
Please see Education indicators in Canada: An international perspective, 2017.
 
2
Please see Education indicators in Canada: An international perspective, 2018.
 
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Metadata
Title
Quantifying the risk of price fluctuations based on weighted Granger causality networks of consumer price indices: evidence from G7 countries
Authors
Qingru Sun
Xiangyun Gao
Ze Wang
Siyao Liu
Sui Guo
Yang Li
Publication date
21-11-2019
Publisher
Springer Berlin Heidelberg
Published in
Journal of Economic Interaction and Coordination / Issue 4/2020
Print ISSN: 1860-711X
Electronic ISSN: 1860-7128
DOI
https://doi.org/10.1007/s11403-019-00273-2

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