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Features of the Correlation Structure of Price Indices
What are the features of the correlation structure of price indices? To answer this question, 5 types of price indices, including 195 specific price indices from 2003 to 2011, were selected as sample data. To build a weighted network of price indices each price index is represented by a vertex, and...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3620382/ https://www.ncbi.nlm.nih.gov/pubmed/23593399 http://dx.doi.org/10.1371/journal.pone.0061091 |
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author | Gao, Xiangyun An, Haizhong Zhong, Weiqiong |
author_facet | Gao, Xiangyun An, Haizhong Zhong, Weiqiong |
author_sort | Gao, Xiangyun |
collection | PubMed |
description | What are the features of the correlation structure of price indices? To answer this question, 5 types of price indices, including 195 specific price indices from 2003 to 2011, were selected as sample data. To build a weighted network of price indices each price index is represented by a vertex, and a positive correlation between two price indices is represented by an edge. We studied the features of the weighted network structure by applying economic theory to the analysis of complex network parameters. We found that the frequency of the price indices follows a normal distribution by counting the weighted degrees of the nodes, and we identified the price indices which have an important impact on the network's structure. We found out small groups in the weighted network by the methods of k-core and k-plex. We discovered structure holes in the network by calculating the hierarchy of the nodes. Finally, we found that the price indices weighted network has a small-world effect by calculating the shortest path. These results provide a scientific basis for macroeconomic control policies. |
format | Online Article Text |
id | pubmed-3620382 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-36203822013-04-16 Features of the Correlation Structure of Price Indices Gao, Xiangyun An, Haizhong Zhong, Weiqiong PLoS One Research Article What are the features of the correlation structure of price indices? To answer this question, 5 types of price indices, including 195 specific price indices from 2003 to 2011, were selected as sample data. To build a weighted network of price indices each price index is represented by a vertex, and a positive correlation between two price indices is represented by an edge. We studied the features of the weighted network structure by applying economic theory to the analysis of complex network parameters. We found that the frequency of the price indices follows a normal distribution by counting the weighted degrees of the nodes, and we identified the price indices which have an important impact on the network's structure. We found out small groups in the weighted network by the methods of k-core and k-plex. We discovered structure holes in the network by calculating the hierarchy of the nodes. Finally, we found that the price indices weighted network has a small-world effect by calculating the shortest path. These results provide a scientific basis for macroeconomic control policies. Public Library of Science 2013-04-08 /pmc/articles/PMC3620382/ /pubmed/23593399 http://dx.doi.org/10.1371/journal.pone.0061091 Text en © 2013 Gao et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Gao, Xiangyun An, Haizhong Zhong, Weiqiong Features of the Correlation Structure of Price Indices |
title | Features of the Correlation Structure of Price Indices |
title_full | Features of the Correlation Structure of Price Indices |
title_fullStr | Features of the Correlation Structure of Price Indices |
title_full_unstemmed | Features of the Correlation Structure of Price Indices |
title_short | Features of the Correlation Structure of Price Indices |
title_sort | features of the correlation structure of price indices |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3620382/ https://www.ncbi.nlm.nih.gov/pubmed/23593399 http://dx.doi.org/10.1371/journal.pone.0061091 |
work_keys_str_mv | AT gaoxiangyun featuresofthecorrelationstructureofpriceindices AT anhaizhong featuresofthecorrelationstructureofpriceindices AT zhongweiqiong featuresofthecorrelationstructureofpriceindices |