Fig 10. Immediate Fehr-Schmidt utilities for a single exchange [1].

Left column shows investor preferences: (top left) Completely unguilty investor values only the immediate payoff, (middle left) Guilt 0.4 investor is less likely to keep everything to themselves (bottom left corner option), (bottom left) Guilt 1 investor will never keep everything to themselves (bottom left option). Right column shows trustee preferences: (top right) unguilty trusty would like to keep everything to themselves. (middle right) Guilt 0.4 is more likely to return at least a fraction of the gains. (bottom right) Guilt 1 trustee will strife to return the fair split always.