This paper answers the following two questions: 1) In the data, can we find a dilution effect of population growth also on per-capita human capital investment? If yes, 2) how can we use this fact to explain theoretically the existence of a differential impact of population change on economic...

We study the effect of railroad access on urban population growth. Using GIS techniques, we match triennial population data for roughly 1,000 cities in nineteenth-century Prussia to georeferenced maps of the German railroad network. We find positive short- and long-term effects of having a...