Econ Papers Daily / 期刊论文
通过助推减少交通外部性：基于GPS追踪实验的结果
Reducing transport externalities through nudging: Results from a GPS-tracked experiment
摘要
This study presents results from a randomized controlled trial in Switzerland that investigates the effects of a non-monetary intervention on transport choices. A GPS-based tracking app records the movements of 814 participants for several months, and automatically detects their travel modes. The treatment consists of sending personalized transport reports to a randomly selected subgroup. These reports contain personalized descriptive and prescriptive information on participants’ transport-related external costs. The treatment reduces the external costs of transport by 12.4%, but only on weekends, and only during the first half of the study. In the second half, the effect dissipates to zero. Based on participants’ travel response and their willingness-to-pay for future reports, we estimate average gross welfare gains of 1.6–3.6 Swiss francs per participant per week in the short run. Of this, 0.8–2.8 Swiss francs reflect the private value of the reports rather than the temporary behavioral change.
中文摘要
本研究呈现了在瑞士开展的一项随机对照试验结果，该试验考察了一项非货币干预对交通选择的影响。一款基于GPS的追踪应用程序记录了814名参与者数月内的出行活动，并自动识别其出行方式。干预措施是向随机选取的一个子组发送个性化交通报告。这些报告包含有关参与者交通相关外部成本的个性化描述性和规范性信息。该干预使交通外部成本降低了12.4%，但仅在周末，且仅在研究的前半段。在后半段，效应消退至零。基于参与者的出行反应及其对未来报告的支付意愿，我们估计短期内每名参与者每周的平均总福利收益为1.6至3.6瑞士法郎。其中，0.8至2.8瑞士法郎反映的是报告的私人价值，而非暂时性的行为改变。