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A note on using PageRank based methods as a sports competency index
Journal of the Korean Data & Information Science Society 2021;32:1249-57
Published online November 30, 2021;  https://doi.org/10.7465/jkdi.2021.32.6.1249
© 2021 Korean Data and Information Science Society.

Cheolyong Park1

1Major in Statistics, Keimyung University
Correspondence to: 1 Professor, Major in Statistics, Keimyung University, Daegu 42601, Korea. E-mail: cypark1@kmu.ac.kr
This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (NRF-2019R1F1A1058723).
Received September 15, 2021; Revised October 19, 2021; Accepted October 19, 2021.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Recently PageRank has started being used as an objective method of measuring a sports competency. This is based on the observation that PageRank measures a website’s importance in a network of websites’ connection and thus can be applied to sports by considering win-loss results of the sports as a network. PageRank can be considered a more reasonable method than simple win-loss counts because PageRank gives more weights to a win over higher rankers than to lower rankers. Since PageRank just considers whether two websites are connected or not, it is evolved into weighted PageRank, and further into SJR (Scimago Journal Rank) and Eigenfactor as journal citation indices. In this article, we will review the formulas of these methods to understand the meaning of each term from the perspective of a sports competency index. Finally we will apply these methods to badminton team match data of middle and high schools in 2018 and then compare the results.
Keywords : Eigenfactor, PageRank, SJR, sports competency index, weighted PageRank.