中文摘要
本文记录了这样一个事实: 农业部门的多样化程度低于其他制造业活动。一个简单模型表明, 这种差异会促成福利分化, 且其作用方式与集约边际上出现不均衡增长所产生的结果在性质上不同。当消费者具有品种偏好时, 他们会内生地降低对生产多样化程度最低部门的支出份额, 从而使贸易条件不利于滞后的经济体。经验证据在农业经济体中支持上述模式。不均衡的产品多样化在解释支出份额变动与贸易条件变化方面发挥了不容忽视的定量作用, 是对现有解释的补充。
Abstract
ABSTRACT This paper documents that agricultural sectors diversify less than other manufacturing activities. A simple model shows that this difference can contribute to welfare divergence in a way that is qualitatively different to what results when uneven growth happens in the intensive margin. When consumers have love of variety, they endogenously reduce their expenditure share on the sector that diversifies production the least, pushing terms of trade against the lagging economy. Empirical evidence supports these patterns in agricultural economies. Uneven product diversification plays a relevant quantitative role in explaining expenditure share shifts and terms of trade movements, which complements existing explanations.