标准贸易模型
A Standard Model of a Trading EconomyIf the relative price of cloth, PC/PF , increases, the economy’s consumption choice shifts from D1 to D2.The move from D1 to D2 reflects two effects: Income effect Substitution effect It is possible that the income effect will be so strong that when PC/PF rises, consumption of both goods actually rises, while the ratio of cloth consumption to food consumption falls.(有这样一种可能，即当 C/PF (有这样一种可能，即当P 提高时，收入效应大到使两种产品的消费都增加， 提高时，收入效应大到使两种产品的消费都增加，而棉 布消费与粮食消费的比率却下降) 布消费与粮食消费的比率却下降)14