In the SP condition, 26% never punished and 39% only punished transfers below 50. This is reversed in the TP condition, indicating that the lower average sanctions for transfers below 50, relative to the SP condition, were also the result of a smaller number of punishers.

XREF: Relates to behavioral economics studies on third-party punishment and altruistic punishment norms.

Ernst Fehr, Third-Party Punishment and …, loc. 102