限界費用に対する価格の上乗せ幅ならびに米経済におけるメガ企業の役割に関する新たな証拠 - himaginary’s diary

というNBER論文（原題は「New Evidence on the Markup of Prices over Marginal Costs and the Role of Mega-Firms in the US Economy」）をロバート・ホールが書いている。以下はその要旨。 The markup of price over marginal cost reveals market power. The distinction between marginal and average cost is key. Average cost is easy to measure, but the price/average cost ratio understates the price/marginal cost ratio when fixed costs are present. I