Do the Poor Pay More for Food? Evidence from the United Kingdom
比较了两种衡量低收入家庭食品成本的方法，发现数量折扣普遍存在且重要，但穷人并未因此支付更高价格，反而因将更多收入花在有折扣的食品上而支付更低价格。
Abstract Does food cost more for low‐income households? This paper compares two well‐known approaches to answering this question. I find that quantity discounts for a broad range of foods are statistically significant and economically important. However quantity discounting does not lead to the poor paying more for food. I find that the poor pay less than average for the food they purchase. This is explained by the poor spending a greater share of their income on foods where quantity discounting occurs.