This study provides evidence that the over-export of grains aggravated the severity of China's Great Famine. We collect county-level data for the 1953-1965 period on death rates, birth rates, amounts of grain procured, output of different types of grain, crop productivity, weather conditions,...

This paper empirically examines how the opening of K-12 schools and colleges is associated with the spread of COVID-19 using county-level panel data in the United States. Using data on foot traffic and K-12 school opening plans, we analyze how an increase in visits to schools and opening schools...