但你可能认为贫穷国家的平均价格比富有国家的低，是因为劳动力更廉价，其实这是“巴拉萨—萨缪尔森效应”带来的偏见。
But you would expect average prices to be cheaper in poor countries than in rich ones because labour costs are lower . This is the basis of the so-called " Balassa-Samuelson effect . "
巴拉萨—萨缪尔森效应