No effect of endowment risk on dictator giving in the lab
通过修改的独裁者博弈实验，检验零均值附加背景风险是否影响捐赠行为，发现风险暴露对平均捐赠额、零捐赠概率和均分倾向均无显著影响，结果不支持纯粹事后不平等厌恶的预测。
While various models of inequality aversion predict different effects of background risk on giving, empirical evidence remains mixed. This study presents a laboratory experiment using a modified dictator game to examine whether exposure to an additive, zero-mean background risk affecting endowments influences giving behavior. Our results show that such exposure does not significantly affect average donation amounts, the likelihood of giving nothing, or the tendency to split resources equally. These findings are consistent with ex ante inequality concerns under risk neutrality; however, overall, our experimental data do not support the behavioral predictions implied by purely ex post inequality aversion.