2024/12/15 更新

写真a

カワタ ユウジ
川太 悠史
所属
政治経済学術院 政治経済学部
職名
助手

経歴

  • 2024年04月
    -
    継続中

    早稲田大学   政治経済学部   助手

学歴

  • 2020年
    -
    継続中

    早稲田大学   大学院経済学研究科  

    博士課程

  • 2018年
    -
    2020年

    早稲田大学   大学院経済学研究科  

    修士課程

所属学協会

  •  
    -
    継続中

    日本経済学会

 

論文

  • 健康経営と生産性—特集 健康経営

    川太 悠史, 北川 梨津, 髙橋 孝平, 大湾 秀雄, 黒田 祥子

    日本労働研究雑誌   66 ( 1 ) 35 - 48  2024年01月

  • The impact of a mobile app-based corporate sleep health improvement program on productivity: Validation through a randomized controlled trial

    Yuji Kawata, Sachiko Kuroda, Hideo Owan

    PLoS ONE   18 ( 10 OCTOBER )  2023年10月

     概要を見る

    Based on a randomized controlled trial applied to employees of a manufacturing company, this study examines the extent to which a corporate sleep program improves workers’ sleep health and productivity. In the three-month sleep improvement program, applicants were randomly divided into a treatment group and a control group, and the treatment group was provided with a noncontact sensing device to visualize their sleep. A smartphone app linked to the device notified them of their sleep data every morning and presented them with advice on behavioral changes to improve their sleep on a weekly basis. The results of the analysis revealed the following. First, even after controlling for factors that may cause sleep disturbances and nocturnal awakenings, such as increased workload and the number of days spent working from home during the measurement period, the treatment group showed improved sleep after the program compared to the control group. Second, the treatment group showed statistically significant improvement in presenteeism (productivity). The effect size on presenteeism through sleep improvement was similar regardless of the estimation method used (i.e., ANCOVA estimator of ATT and two 2SLS methods were performed). In particular, we confirmed that productivity was restored through sleep improvement for the participants who diligently engaged in the program. These results suggest that promoting sleep health using information technology can improve sleep deficiency and restore productivity.

    DOI PubMed

    Scopus

    1
    被引用数
    (Scopus)
  • Peer effects on job satisfaction from exposure to elderly workers

    Yuji Kawata, Hideo Owan

    Journal of the Japanese and International Economies   63  2022年03月

     概要を見る

    The Elderly Employment Stabilization Law, revised in 2006, helped the government increase elderly employment. While there has been much debate on whether the reemployment of elderly workers has substituted for or increased the employment of young workers, little attention has been paid to the potential peer effects of the former group on the latter's productivity and other outcomes in the workplace. There might be knowledge spillovers from elderly workers to peers (positive peer effects) or the presence of unmotivated elderly workers lowering the morale of their coworkers (negative peer effects). In this paper, we investigate such peer effects from exposure to elderly workers using the employee satisfaction survey of a Japanese firm. We show that, on average, elderly workers do not have significant peer effects on coworkers’ satisfaction. However, the effects are heterogeneous depending on the ability of elderly workers as measured by their wages, and the age and job levels of their peers. Namely, nonmanagerial workers, particularly those in their 50s, are more satisfied and coworkers in their 30s and 40s receive more training when they work with elderly workers. The positive effects are significant when the focal elderly workers come from other units rather than when they stay in the same units implying that the sharing of broad experience might mediate the effect. In contrast, the presence of elderly workers makes first-line managers feel that there is poor communication in the workplace.

    DOI

    Scopus

    2
    被引用数
    (Scopus)

共同研究・競争的資金等の研究課題

  • 職場におけるピア効果の分析―人事データと健康データを組み合わせた研究―

    日本学術振興会  科学研究費助成事業

    研究期間:

    2023年03月
    -
    2024年03月
     

    川太 悠史

     概要を見る

    本研究は、実在する企業の人事データ・健康データを用いて、「同じ職場の社員の間で、特定のアウトカムにおけるピア効果がどれほど生じているか」を明らかにすることを目的としている。
    2022年度は、人事情報データ、福利厚生カフェテリアプランの利用履歴、健康データの3種類のデータを整理し、パネルデータを作成した。その上で、社員の属性に着目し、福利厚生カフェテリアプランの利用に関する記述的分析を実施した。
    本研究では「福利厚生カフェテリアプランを利用しているか」、また「どれだけ利用しているか」という変数に着目し、職場の同僚の間でピア効果が生じているかを明らかにする。このようなピア効果を検討する前に、2022年度は「個人の属性」と「福利厚生カフェテリアプランの利用」との間の関係を分析し、「福利厚生カフェテリアプランの利用」が少ない社員の特徴を明らかにした。加えて、「福利厚生カフェテリアプランを利用したタイミング」にも着目し、リサーチクエスチョンを発展させている。