@article{oai:ipsj.ixsq.nii.ac.jp:00225608,
 author = {二之宮, 大聖 and 財津, 大夏 and 三宅, 悠介 and 鳥海, 不二夫 and Taisei, Ninomiya and Hiroka, Zaitsu and Yusuke, Miyake and Fujio, Toriumi},
 issue = {4},
 journal = {情報処理学会論文誌},
 month = {Apr},
 note = {近年注目を集めているeコマース市場は，COVID-19の流行から急激な成長を遂げている．その中でも個人間取引であるC2C市場の成長は目覚ましい．一方，コロナ禍でのC2Cマーケットの性質を分析した研究は少なく，特に出品者の行動傾向についての理解は進んでいない．本研究では，C2Cマーケットの取引データを用いて，コロナ禍で参入したユーザの行動傾向を調べるとともに，どのようなユーザがC2Cマーケットを継続的に利用するようになったのかを明らかにした．結果として，COVID-19の影響で市場に不足したマスクの取引を目的に多数のユーザが登録した一方で，社会問題となった買い占めはC2Cマーケット上では起こらなかったことが示唆された．また，マスク取引ユーザのうち出品者のみ定着傾向が高いことが明らかとなり，マスク販売が成功体験として定着への機能を果たしていることが示唆された．これらの結果は，たとえ一時的なブームであっても出品者に販売成功の機会を与えるような，流行をとらえた施策設計の有効性を裏付けるものである．, The e-commerce market, which has attracted much attention in recent years, has been growing rapidly since the COVID-19 pandemic. Among these, the growth of the market for consumer-to-consumer (C2C) transactions has been remarkable. However, few studies have analyzed the C2C market during the COVID-19 pandemic, and in particular, the behavioral tendencies of the sellers are not well understood. In this study, we used C2C market transaction data to analyze the behavior of users who joined the C2C platform during the COVID-19 pandemic and identified the users who continued to use it. We found that while a large number of users registered for the service to trade face masks that were in short supply in the market due to heavy demand, there was no tendency to buy up, which had been a social problem. In addition, among the users who traded masks, only the sellers continued to use the service at a high rate, suggesting that selling masks functioned as a successful experience for retention. This shows that giving sellers the experience of selling by implementing measures that match the trends, even if it is only a temporary boom, is effective to acquire and retain users.},
 pages = {919--925},
 title = {C2Cマーケットにおけるコロナ禍でのユーザ行動傾向分析},
 volume = {64},
 year = {2023}
}