Vertical Relationships: An Introduction
这篇短文是《产业经济学杂志》关于纵向关系（包括纵向一体化和纵向约束）特刊的导论，概述了近期理论和实证研究的复兴及其在产业政策中的核心地位，并简要介绍了特刊各篇论文的贡献。
This short essay introduces a special issue of The Journal of Industrial Economics on vertical relationships, including both vertical integration and vertical restraints. In the last few years, there has been a resurgence of theoretical and empirical work on vertical relationships, and they are central to major current issues in industrial policy. In this introduction, the authors briefly describe the contribution by the papers that make up this special issue.