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Punish and Voice: Punishment Enhances Cooperation when Combined with Norm-Signalling
- Giulia Andrighetto,
- Jordi Brandts,
- Rosaria Conte,
- Jordi Sabater-Mir,
- Hector Solaz,
- Daniel Villatoro
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- Published: June 12, 2013
- https://doi.org/10.1371/journal.pone.0064941