We study how a significant relaxation of internal migration restrictions affects labor market outcomes of incumbent migrants and natives, exploiting the 2014 hukou reform in China, which substantially removed the migration barriers of cities with an urban population below 5 million (nonmegacities). Using a difference-in-differences method, we find that migrants’ wages in nonmegacities experienced approximately a 2.6%–7.9% decline relative to that in megacities after the policy. The policy had nonnegative impacts on the wages of natives in nonmegacities. These results suggest that the downward wage pressure imposed by new migrants falls primarily on incumbent migrants rather than on natives.

This article investigates how transportation networks shape firms’ geographic footprint by reducing monitoring costs of distant investments. Exploiting the staggered expansions of China’s passenger high-speed rail (HSR) network, we document that the amount of intercity investment between a pair of cities increases by 45% with the introduction of an HSR line connecting the cities. We enhance the causal inference by applying high-dimensional fixed effects, and focusing on city pairs that are “accidentally” connected in the network. The HSR effect is the strongest in industries that require on-site monitoring, as well as for controlling stakes in large distant investments.