The price of a burger depends heavily on local inputs such as rent and wages, which are not easily arbitraged across borders and tend to be lower in poorer countries.

• 一块汉堡的价格在很大程度上取决于租金和工资等当地投入，它们不会轻易地遭到跨国套汇，而且在穷国的水平则更加低下。