Relative Price Dispersion: Evidence and Theory
研究发现同一市场同一周内，同一商品的价格差异中有30%来自相对价格离散，即不同零售商对同一商品相对于其他商品的定价差异，这源于卖家区分高估值和低估值买家的定价策略。
Relative price dispersion refers to persistent differences in the price that different retailers set for one particular good relative to the price they set for other goods. Relative price dispersion accounts for 30 percent of the overall variance of prices at which the same good is sold during the same week and in the same market. Relative price dispersion can be rationalized as the consequence of a pricing strategy used by sellers to discriminate between high-valuation buyers who need to make all of their purchases in one store, and low-valuation buyers who are able to purchase different items in different stores.