足球转会市场网络的共同体结构:以意甲联赛为例

Pub Date : 2023-11-09 DOI:10.3233/jsa-220661
Lucio Palazzo, Roberto Rondinelli, Filipe Manuel Clemente, Riccardo Ievoli, Giancarlo Ragozini
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引用次数: 0

摘要

男子足球转会市场是一个复杂的现象,需要用合适的方法进行深入研究。网络分析可以通过网络指标来衡量转移市场的关键要素,如度中心性、枢纽和权威得分、中介中心性等。此外,可以提出社区检测方法来揭示足球市场不可观察的模式,甚至考虑诸如转会类型,球员的年龄或角色以及参与转会流程的经纪人等辅助变量。这些方法适用于意大利甲级联赛(意甲)的20支球队产生的球员转会流,这些流动包括来自世界各地的球队。我们考虑2019年夏季市场会议,即2019-2020赛季开始时。结果也有助于更好地理解意大利足球转会市场的一些特点,即精英球队的不同方法。网络指数显示了不同市场策略的存在,突出了亚特兰大、热那亚和萨索洛等中级球队的作用。该网络揭示了一个分裂成几个社区的核心-外围结构。Infomap算法确定了14个基于单个团队的社区和3个由两个团队组成的社区。后者中有两支球队是由一支顶级球队和一支中级球队组成的,这表明存在合作和类似的市场行为,而第三支球队则是由第二级别(乙级)晋升的两支球队主导的。
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Community structure of the football transfer market network: the case of Italian Serie A
The men’s football transfer market represents a complex phenomenon requiring suitable methods for an in-depth study. Network Analysis may be employed to measure the key elements of the transfer market through network indicators, such as degree centrality, hub and authority scores, and betweenness centrality. Furthermore, community detection methods can be proposed to unveil unobservable patterns of the football market, even considering auxiliary variables such as the type of transfer, the age or the role of the player, and the agents involved in the transfer flow. These methodologies are applied to the flows of player transfers generated by the 20 teams of the Italian first division (Serie A). These flows include teams from all over the world. We consider the summer market session of 2019, at the beginning of the season 2019-2020. Results also help to better understand some peculiarities of the Italian football transfer market in terms of the different approaches of the elite teams. Network indices show the presence of different market strategies, highlighting the role of mid-level teams such as Atalanta, Genoa, and Sassuolo. The network reveals a core-periphery structure splitted into several communities. The Infomap algorithm identifies 14 single team-based communities and three communities formed by two teams. Two of the latter are composed of a top team and a mid-level team, suggesting the presence of collaboration and similar market behavior, while the third is guided by two teams promoted by the second division (Serie B).
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