Fig. S1.

Scatterplots of individual maximin weights for distributions (α_distribution) and gambles (α_gamble) derived from participants’ 40 choices using Charness–Rabin’s quasi-maximin model (6) (Eq. S1). α_i ∊ [0, 1] is a parameter that captures the weight reflecting the maximin principle. Individuals with α = 1 in distributions correspond to pure Rawlsians, for whom welfare is measured solely by the maximin criterion. Individuals with α = 0 in distributions correspond to pure utilitarians (for details of the quasi-maximin model, see SI Materials and Methods, Economic model for maximin weight estimation). Participants who preferred the maximin distributions for others (higher α_distribution) tended to favor the maximin gambles for themselves (higher α_gamble) (ρ = 0.54; P < 0.0001). The mean α was also significantly greater in distributions (M = 0.62) than in gambles (M = 0.44) [F_(1,65) = 14.39; P < 0.001], corroborating the more frequent maximin choices in distributions than in gambles. Points colored in blue correspond to the participants classified as Rawlsians in distributions for others but largest-total seekers in gambles for self according to their most frequent choices (Fig. 1B).