INCOME REDISTRIBUTION AND PUBLIC GOOD PROVISION: AN EXPERIMENT
通过四人小组实验，研究收入再分配对公共品自愿供给的影响，发现再分配不改变小组总供给量，但个体调整存在不对称性。
We experimentally investigate the impact of income redistribution on voluntary contributions by groups of four subjects. We compare equalizing and unequalizing redistribution. Our data are consistent with the neutrality theorem: Redistribution does not affect the amount of voluntarily provided public good at the group level. However, at the individual level, subjects tend to underadjust with respect to the Nash prediction. We also observe an insignificant adjustment asymmetry between the poor and the rich: Subjects who become poorer adjust their contribution by a larger absolute amount than subjects who become richer. Finally, poor subjects tend to overcontribute significantly more than rich subjects.