Deregulating antitrust policy
研究了自1980年代以来市场集中度上升、竞争减少的背景下，美国司法部反垄断政策执行的变化，包括并购指南的调整和行政行动的变化。
Abstract Starting in the 1980s, market concentration began to rise dramatically decreasing competition and increasing market power for the firms that remain. Such developments have important effects on a number of economic variables such as the efficiency of our economy and income inequality. Thus, it is important to ask: how has the administration of antitrust policy changed over the last half century? To shed more light on these important questions, we explore both change in policy outline by the Department of Justice in its Horizontal Merger Guidelines and change in administrative actions looking at both secondary requests for mergers and acquisitions of different sizes, and pre, post and change in Herfindahl–Hirschman Index in mergers and acquisitions contested by the Department of Justice through the courts.