北大经院工作坊第1188场
Concentration and Markups in International Trade
国际经济学与实证产业组织工作坊
主讲人：Ayumu Ken Kikkawa（Assistant Professor at the University of British Columbia Sauder School of Business）
主持老师：（北大国发院）薛思帆
参与老师：
（北大经院）杨汝岱、田巍、刘政文、吴群锋、莫家伟
（北大国发院）余昌华、赵波、李明浩、李林橦
（北大新结构）王歆、徐铭梽
时间：2025年11月13日（周四）14：00-15：30
地点：北京大学国家发展研究院承泽园229教室
主讲人简介：
Ayumu Ken Kikkawa is an Assistant Professor at the University of British Columbia Sauder School of Business. He has earned a Ph.D. in Economics from the University of Chicago in 2018. Dr. Kikkawa’s research focuses on trade between firms, using detailed micro data on firms and networks from multiple countries. His research has been published in top outlets such as the Journal of International Economics, Journal of the European Economic Association, and the Review of Economic Studies.
摘要：
This paper derives a closed-form expression linking aggregate markups on imported inputs to concentration in a model of firm-to-firm trade with two-sided market power. Our theory extends standard oligopoly insights in two dimensions. First, it reveals that markups increase with exporter concentration and decrease with importer concentration, reflecting the balance of oligopoly and oligopsony forces. Second, it adapts conventional market definitions to reflect rigid trading relationships, yielding new concentration measures that capture competition in firm-to-firm trade. Analysis of Colombian transaction-level import data shows these differences are key to understanding markup dynamics in international trade.
北大经院工作坊第1189场
Weak Institutions and Native-Settler Violence on the American Frontier
经济史工作坊
主讲人：Liang Diao（University of Osaka）
主持老师：（北京大学）赵一泠
参与老师：
（北大经院）郝煜、管汉晖、周建波
（北大光华）颜色、李波
（清华大学）徐志浩
时间：2025年11月13日（周四）12:00-13:30
地点：北京大学经济学院302会议室
主讲人简介：
Liang Diao is an Assistant Professor (without tenure) at the Institute of Social and Economic Research, University of Osaka. His research focuses on the role of institutions in mitigating environmental hazards and resolving conflicts, using novel datasets on Greece’s land reforms and Native–settler conflicts on the American frontier. His broader research interests include new institutional economics, applied microeconomics, and experimental economics. He received his Ph.D. and M.A. in Economics from Simon Fraser University, and a B.Math in Mathematical Studies from the University of Waterloo, Canada.
摘要：
Attention to violent conflicts on the U.S. frontier typically centers on the Plains Wars. However, a comprehensive novel dataset covering more than 200 tribes in 21 states reveals that Native American and settler deaths were concentrated in the Southwest between 1840 and 1870. Exploiting exogenous arrival times shows that conflicts were mostly driven by small groups of settlers in counties where state capacity was absent, ceased when state institutions arrived, and had fewer deaths when the tribe involved had strong hierarchical organization and military strength. These findings underscore the role of strong institutions and effective governance in reducing violence.
北大经院学术午餐会
第204期
Intertemporal Bridging: How Patent Pledgeability Shapes Corporate Tax Planning
主讲人：倪骁然（中央财经大学创新发展学院教授）
主持老师：高明（北京大学经济学院长聘副教授）
时间：2025年11月14日（周五）12:30-14:00
地点：北京大学经济学院107会议室
主讲人简介：
倪骁然，中央财经大学创新发展学院、中国金融发展研究院教授、博士生导师。入选国家级青年人才、财政部高层次财会人才计划。在《经济研究》（2篇）、《管理世界》、《经济学（季刊）》、《中国工业经济》（2篇）、《金融研究》（3篇）、《经济学动态》、《统计研究》、《中国社会科学（英文版）》等国内重要期刊和包括UTD 24、FT 50、ABS 3/4在内的国际学术期刊如Journal of International Business Studies、Journal of Business Ethics（2篇）、Journal of Economic Behavior and Organization、Journal of Corporate Finance（7篇）、Journal of Banking and Finance（7篇）、Journal of Empirical Finance、Journal of Financial Markets、Financial Management等发表论文60余篇。主持国家自然科学基金面上项目、青年项目。2017-2025年曾在厦门大学经济学院、王亚南经济研究院历任助理教授、副教授、教授。
摘要：
When assets can serve as collaterals, their values contain a pledgeability premium, which facilitates firms’ strategic usages. In the context of China’s staggered Patent Pledge Financing Pilot program, contrary to standard theory predicts that improved credit access reduces internal financing needs, we find that patent pledgeability increases corporate tax savings by 12-23% of the sample standard deviation. This counterintuitive result is due to the coincidence of the intertemporal structure of patent collaterals and the intertemporal nature of tax planning: To develop patents that may or may not materialize, firms have to incur immediate innovation costs but only realize future pledgeability benefits. To bridge this gap, firms employ tax-deferred cash flows to temporally fund patenting activities. The increase in tax savings is especially pronounced among firms that are financially constrained, have weaker innovation capabilities, and face greater proprietary cost concerns. Notably, the forward-looking value of pledgeability still matters for firms that have actually pledged their patents. Overall, we shed new light on the pledgeability premium of patents and on the role of tax planning in achieving dynamic optimization in intertemporal decision-making.
供稿：科研与博士后办公室
美编：闻听
责编：度量、雨禾、雨田
