【题 目】 Regional Gravity and the Gains from Trade: Product-Level Evidence from China
【时 间】2026年11月20日（星期五），14:00-15:30
【地 点】后主楼1722
【主讲人】戴若尘 副教授（中央财经大学经济学院）
【主持人】戴 觅 教 授（91在线 ）
摘要：We estimate intra-country, product-level gains from trade using administrative records of more than 4 billion firm-to-firm transactions across Chinese prefectures. The regional gravity elasticity bundles 3 forces: how steeply trade costs rise with travel time (the intensive cost margin), how strongly trade responds to those costs (substitution), and how quickly buyer-seller relationships thin out with distance (the extensive matching margin). We separate them by combining the within-market dispersion of prices, the level of price gaps across origins, and the count of bilateral relationships that our data uniquely observe. Across 465 products, the cost and substitution elasticities appear strongly negatively related, and text-based measures of product complexity help explain why: complexity raises trade costs but leaves the trade response unchanged.
报告人简介：中央财经大学经济学院副教授，博士生导师，北京大学国家发展研究院博士。兼职职务包括北京大学企业大数据研究中心兼职研究员，中国信息经济学会理事，北京市经济学总会会员等。任China Economic Review数据编辑。研究兴趣为：创业创新，企业动态，发展经济学。代表性中文论文发表于《中国社会科学》《世界经济》《管理科学学报》等期刊，代表性英文论文发表于American Economic Journal：Macro，Journal of Development Economics, Journal of Law Economics & Organization, Journal of Economic Behavior & Organization等期刊。主持国家自然科学基金青年项目两项。