主讲人：聂宇 教授
邀请人：马万经 教授
时间：2020年04月30日（周四）10:00-11:00
地点：Zoom线上会议室
会议ID：94560718493
会议密码：810124
会议链接：https://zoom.com.cn/j/94560718493
主讲人简介
聂宇博士，美国西北大学土木与环境工程学院教授，本科毕业于清华大学结构工程专业，此后在新加坡国立大学获得硕士学位、加利福尼亚大学戴维斯分校获得博士学位。聂宇博士的研究覆盖交通系统分析，交通经济学、可持续交通等多个专业领域。他曾是TRB委员会交通网络建模和交通流理论与特征方向的成员。目前担任Transportation Science副主编、Networks and Spatial Economics区域主编，Transportmetrica-B和Transportation Research Part B的编辑咨询委员会成员。聂宇博士的研究得到了美国国家科学基金会、美国交通运输部，美国能源部和伊利诺伊州交通运输部的支持。
主讲内容简介
Uberization promises to transform society based on an intuitive proposition: Advanced peer-to-peer matching guarantees greater overall efficiency. Here we show a paradox challenging this proposition in uberized ride-hail service, known as e-hail. By analyzing hundreds of local markets in Shenzhen, China, we discover e-hail is outperformed—in terms of wait time and trip production—by taxis hailed off street in areas with high densities of passengers and drivers. This paradox arises because a quicker match does not always expedite and enhance a service. On the contrary, it can induce competition that undermines the network effect, making a passenger less likely to benefit from more drivers, and vice versa, in e-hail than in taxi service. Consequently, simply attracting more users may not improve e-hail’s efficiency (defined as trip production at a given density of passengers and drivers), because its competitive edge diminishes with scale. The finding implies uberization has a limited impact on efficiency and is unlikely to create a “winner-take-all” in transportation.
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