Equation 14 · Part 1 · Why We Punish Strangers: The Evolution of Human Cooperation
Symbol x
What this part means
the writing.
Its job in the formula
x is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol x→Article meaning
Where the article explains it
Writing x for the frequency of cooperators, y for the frequency of punishers, and k for the cost of punishing a single defector, the punisher’s expected fitness penalty is approximately = k(1 - x - y) which falls as the residual pool of defectors, 1 - x - y , shrinks.
The passage around this formula
which falls as the residual pool of defectors, 1 - x - y , shrinks. Once a group happens to reach a state where
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Sources cited in the article section
- [9] The Evolution of Altruistic Punishment ↗
- [11] Beyond Markets and States: Polycentric Governance of Complex Economic Systems ↗
- [8] Reciprocity: Weak or Strong? What Punishment Experiments Do (and Do Not) Demonstrate ↗
- [12] Strategies for Cooperation in Biological Markets, Especially for Humans ↗
These citations provide research context; check each source for the exact claim it supports.