主讲人：Peter Morrow, University of Toronto

题目：Identifying Firm vs. Product Markups Using Production Data: Micro Estimates and Aggregate Implications

参与老师：余昌华、薛思帆

时间：2026年4月14日（周二）上午10:00-11:30（北京时间）

地点：承泽园245教室

摘要：

We examine the identification of product-level and firm-level markups using multi- output production data. Identifying product-level markups within multi-product firms relies on identifying two technological features that past research has ignored: (i) the magnitude of within-firm productivity differences, and (ii) the degree of joint produc- tion. Monte Carlos indicate that ignoring (i) and (ii) can quickly lead to bias. A weighted average of firm-product level markups (the “firm markup”) can be identified using standard empirical methods without disciplining (i) nor (ii). We show that the firm markup is often recovered from the popular De Loecker and Warzynski (2012) formula and is welfare relevant.

主讲人介绍：

Peter Morrow is a Professor of Economics at the University of Toronto. He has earned a Ph.D. in Economics from the University of Michigan in 2007. His research focuses on comparative advantage, trade policy, firm behavior, and labor-market adjustment to trade, combining trade theory with careful empirical work. His research has been published in top outlets such as the Journal of International Economics and the Review of Economic Studies. He serves as the co-editor role at the Canadian Journal of Economics.