Responses to Extreme Temperatures: Migrant Networks and International Migration from El Salvador
研究发现极端温度显著增加萨尔瓦多的国际移民，因为高温导致玉米减产，农业收入下降，而美国已有的移民网络使移民变得可行。
We show that exposure to extreme temperatures significantly increases international migration from El Salvador, where nearly a quarter of the population lives in the United States. Extreme temperatures reduce corn yields, leading producers to decrease their use of postharvest inputs and demand for agricultural workers. These income losses, combined with established US migration networks, increase emigration. Our findings highlight how international migration serves as a response to extreme temperatures when destination networks are strong and migration remains financially feasible. This pattern is not unique to El Salvador: Roughly 30 million farms globally are in low-income settings with access to remittances.