Nudging Away from Plastic Bags with Charitable Donations
研究通过社会准实验发现，自愿性代币捐赠计划通过提供小额慈善捐赠激励，使一次性塑料袋使用概率降低11.4-12.9个百分点（约30%-34%），为无法实施塑料袋税或禁令的地区提供了有效替代方案。
To respond to the environmental problems posed by disposable plastic bags, several mechanisms exist, such as bag taxes and bans, but such policies are infeasible in several U.S. states and municipalities. This study uses a social quasi-experiment to examine the effect of a voluntary token-donation program, which reduces disposable plastic bag use by providing a small charitable donation incentive. We find that the token-donation program reduces the probability of disposable bag use by 11.4-12.9 percentage points, representing about 30%-34% decrease in bag use. Our results demonstrate effective mechanisms to reduce plastic bags exist without government-mandated policy.