On the occasion of the 10th anniversary of the 2010 U.S. Horizontal Merger Guidelines, this article provides an overview of the state of economic analysis of unilateral effects in mergers with differentiated products. Drawing on our experience with merger enforcement in Europe, we discuss both static and dynamic competition, with a special emphasis on the calibration of competitive effects. We also discuss the role of market shares and structural presumptions in differentiated product markets.

中文翻译：

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差异化产品的合并：我们站在哪里？

在 2010 年美国横向并购指南颁布 10 周年之际，本文概述了对差异化产品并购中单边效应的经济分析状况。借鉴我们在欧洲兼并执法方面的经验，我们讨论了静态和动态竞争，特别强调了竞争效应的校准。我们还讨论了市场份额和结构性假设在差异化产品市场中的作用。