This paper estimates the elasticity of substitution between capital and skill using variation across U.S. counties in immigration-induced skill-mix changes between 1860 and 1930. We find that capital began as a q-complement for skilled and unskilled workers, and then dramatically increased its...

We study the short-run effects of a gamified online entrepreneurship training offered to high school students in Rwanda during the COVID-19 pandemic. Using a randomized controlled trial, we estimate sizeable effects of the 6-week training on entrepreneurial activity. One month after the...

This paper examines the effects of renovating deteriorated public spaces on local socioeconomic outcomes. We analyze the impacts of a randomized experiment implemented in 28 fragile neighborhoods of Santiago, Chile. Our findings indicate that the renovation of local squares led to increased use...