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Original Research
Published 13 January 2026
Integrating upstream and downstream reciprocity stabilizes cooperator-defector coexistence in others-only public goods games
Tatsuya Sasaki · Satoshi Uchida · Isamu Okada · Hitoshi Yamamoto · Yutaka Nakai
Frontiers in Behavioral Economics
doi 10.3389/frbhe.2025.1697570