entails. It could either be a substantive factual inference based on economic theory or a procedural device for artificially … presumption as a formal rebuttable presumption, modern merger analysis needlessly complicates the use of market concentration …

coordinated and unilateral competitive effects of merger. The central issue considered is when and how market shares, and market … concentration statistics derived from them, form an appropriate basis for presuming harm to competition from merger. This revision …

horizontal merger. Because the new theoretical approaches are not easily modified to encompass welfare considerations, except in …

price effects are possible outcomes of the merger activity …

that in absence of any penalty on cartel, a firm always prefers a cartel to merger, when the latter does not involve any … concentration among the competitive fringe lowers the profitability of merger as compared to cartel. We then discuss the impact of … antitrust regulation against cartel in the absence and presence of merger regulations. We find that in our model, regulation …