Sufficient Decisions in Multi‐Sided and Multiproduct Markets
提出一种将企业多决策模型转化为单决策模型的方法，称为充分决策，从而简化分析，适用于双边市场和多产品市场的税收转嫁与并购审查。
Abstract We show that in many models where firms make multiple decisions, analysis can be made more tractable by re‐formulating the model into one in which each firm makes a single choice, which we call a sufficient decision. The transformation allows application of standard techniques in these settings, including pass‐through for tax incidence and upward pricing pressure for merger analysis. The transformation works because the assumption of profit maximization links the firms’ decisions together. Examples include models of monopoly and oligopoly in two‐sided markets, where a natural sufficient decision may be the number of transactions that the firm facilitates, and multiproduct markets.