We analyse how spatial disparities in innovation activities, coupled with migration costs, affect economic geography, market structure, growth and regional inequality. We provide conditions for existence and uniqueness of a spatial equilibrium, and for the endogenous emergence of industry clusters. Spatial variations in knowledge spillovers lead to spatial concentration of more innovative firms. Migration costs, however, limit the concentration of economic activities in the most productive region. Narrowing the gap in knowledge spillovers across regions raises growth, and reduces regional inequality by making firms more sensitive to wage differentials. The associated change in the industry concentration has positive welfare effects.

中文翻译：

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知识地理和研发主导的增长

我们分析了创新活动的空间差异以及迁移成本如何影响经济地理、市场结构、增长和区域不平等。我们为空间均衡的存在和唯一性，为产业集群的内生产生提供了条件。知识溢出的空间变化导致更多创新公司的空间集中。然而，迁移成本限制了经济活动集中在生产力最高的地区。缩小跨地区知识溢出的差距可以促进增长，并通过使企业对工资差异更加敏感来减少地区不平等。行业集中度的相关变化具有积极的福利效应。