Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Many states nationalized portions of their railroad network between 1860 and 1912. This article uses new cross-country data to examine which factors contributed to nationalizations and how nationalizations influenced network expansion. I find evidence that nationalizations were greater in countries with low constraints on the executive branch, with French and German civil law systems, and where neighboring countries had higher military capability. I also find evidence that nationalizations reduced mileage growth. The results suggest that external military threats increased the appeal of nationalizations, while legal and political institutions influenced their costs. They also suggest that nationalizations reduced investment incentives.