The Law of One Price - A Case Study
利用跨国零售商的交易价格数据，发现相同产品在不同国家的价格差异高达20%到50%，且这种差异不能用当地成本差异解释，可能与战略定价有关。
We use retail transaction prices for a multinational retailer to examine the extent and permanence of violations of the law of one price. For identical products, we find typical deviations of 20–50 percent, with some evidence for convergence over time. Such differences might be due to differences in local costs. If so, relative prices of similar products (round versus square mirrors) should be equal across countries. In fact, relative prices vary significantly across very similar goods within a product group. The finding suggests that differences in local distribution costs, local taxes, and probably tariffs do not explain the price pattern, leaving strategic pricing or other factors resulting in varying markups as alternative explanations.