Fig. 2: Drought moderating in- and outgroup effects on altruism.
From: Drought exposure decreases altruism with salient group identities as key moderator
Point estimates derived from marginal effects and predictive margins for altruism over different values for SPEI-12. Ingroup refers to Sunni respondents and outgroup can be either Shia, Yazidi or both. Overlaid histograms show the distribution of drought SPEI-12 average in the sample. For all sub-figures, shaded areas (pink, ingroup; purple, Shia outgroup; grey, Yazidi outgroup) indicate confidence bands at 0.95 (two-tailed, n = 3,765). a, The average marginal effect of ingroup membership on altruism, with outgroup as a base category. b, For the same model, predictive values for altruism based on in- and outgroup treatment. Here outgroup can be both subgroups. The underlying model for the lower panel uses two outgroup treatments. c, The average marginal effect of outgroup membership, with ingroup as base category. d, Predictive values for altruism based on in- and outgroup treatment.
