NBAデータ分析により報酬格差が協調性を損なうと判明(Study of NBA finds that pay inequity among top performers erodes cooperation)

2026-02-16 ワシントン州立大学(WSU)

米国のWashington State Universityの研究によると、プロバスケットボールリーグNBAの「戦略的コア」(最も多く出場時間を持つ5人の主力選手)内で給与格差が大きいチームは協力行動が低下し、勝率が低くなることが分かった。研究者らは2009–10〜2019–20シーズンのデータを分析し、単に努力するだけではなく、連携して役割を果たす協調性(coordination)が勝利に不可欠であり、コア選手間の不公平感がこれを損なうと指摘した。この効果は賃金差がパフォーマンスの違いに基づく場合には見られないが、不公平だと感じられる差があると協力が弱まり、結果としてチーム全体の成果が悪化する傾向が認められた。研究成果はチームダイナミクスや組織マネジメントへの示唆を含み、スポーツだけでなく一般的な職場環境にも応用できる可能性があるとのこと。

NBAデータ分析により報酬格差が協調性を損なうと判明(Study of NBA finds that pay inequity among top performers erodes cooperation)

Cooperation in the workplace may be eroded when the core members of a team are paid unfairly in relation to one another, according to a new WSU study of pay and performance in the NBA (composite featuring photos by Brocreative and Rawpixel.com on Adobe Stock).PULLMAN, Wash. — NBA teams that pai

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報酬を見せる?公平に見せる方がよい:チームの戦略中核における賃金格差の影響 Show Them the Money? Better Do it Fairly: The Effects of Pay Inequity in a Team’s Strategic Core

Jeremy M. Beus,Shaun M. Parkinson & Jay T. Bates

Human Performance  Published:11 Dec 2025

DOI:https://doi.org/10.1080/08959285.2025.2601951

ABSTRACT

Teams are driven by their strategic core – members who encounter more team problems, are more exposed to team tasks, and are more central to team workflow. Although research indicates that committing more financial resources to the strategic core is connected with team success, doing so imposes greater pay dispersion and research is inconclusive regarding its effects. This may be because team pay dispersion is applied too broadly – mistakenly considering all team members as coequals – and due to unexamined mechanisms that might clarify the connection between pay dispersion and team performance. Using a team-centered view of equity theory, we elucidate the effects of team pay inequity by focusing on pay inequity in the strategic core and by testing its indirect association with team performance via the theorized mechanisms of collective effort and team coordination. We tested our hypotheses in a sample of professional basketball teams and find a negative connection between pay inequity and team performance, but only when the inequity exists within the strategic core (as opposed to the entire team) and only via the mechanism of team coordination (not collective effort). These findings clarify the effects of pay inequity in teams and underscore the importance of the strategic core.

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