标题： 经济地理与结构变化 显示英文标题

标题： Economic Geography and Structural Change

摘要： 随着国家的发展，农业的相对重要性下降，经济活动变得空间集中。 我们构建了一个整合结构变化和区域差异的模型，以共同捕捉这些现象。 确保分析可处理性的关键建模创新是引入非同质柯布-道格拉斯偏好，其特点是替代弹性恒定为单位弹性，而收入弹性不是常数。 随着劳动生产率随时间增加，经济福利提高，导致农业商品的支出份额下降。 劳动力从农业中重新分配，工业在空间上集中，进一步提高总体生产率：结构变化和区域差异是相互促进的增长过程的结果和传播者。 显示英文摘要

摘要： As countries develop, the relative importance of agriculture declines and economic activity becomes spatially concentrated. We develop a model integrating structural change and regional disparities to jointly capture these phenomena. A key modeling innovation ensuring analytical tractability is the introduction of non-homothetic Cobb-Douglas preferences, which are characterized by constant unitary elasticity of substitution and non-constant income elasticity. As labor productivity increases over time, economic well-being rises, leading to a declining expenditure share on agricultural goods. Labor reallocates away from agriculture, and industry concentrates spatially, further increasing aggregate productivity: structural change and regional disparities are two mutually reinforcing outcomes and propagators of the growth process.