Fig. 3. A much higher proportion of hypercompetitive cooperators are found in MPA sites than in no-MPA sites.

Percentage of hypercompetitive cooperators (also highlighted in yellow) are found in the upper right quadrant at no-MPA and MPA sites, and they are defined as those individuals allocating at least 50% of their endowment to the group fund and 50% of their endowment to reducing others’ payoff. “I am” refers to the participant making the choice depicted and “other is” refers to the participant the “I am” is paired with.