欧洲央行：创新无国界？技术扩散的地理学（英文版）

The diffusion of new technologies across firms is a central driver of productivity growth. Despite the rapid expansion of artificial intelligence (AI)as a general purpose technology,its adoption remains uneven across firms and countries,including within integrated economic areas such as the euro area. Understanding why AI investment remains concentrated in some firms and locations while lagging in others is essential for both economic research and policy design.This paper examines whether com