This paper introduces the concept of “climate matching” as a driver of migration and establishes several new results. First, we show that climate strongly predicts the spatial distribution of immigrants in the US, both historically (1880) and more recently (2015), whereby movers select...

The role of friends in the US opioid epidemic is examined. Using data from the National Longitudinal Survey of Adolescent Health (Add Health), adults aged 25-34 and their high school best friends are focused on. An instrumental variable technique is employed to estimate peer effects in opioid...

We use administrative tax data to analyze the cumulative, long-run effects of California’s 2004 Paid Family Leave Act (CPFL) on women’s employment, earnings, and childbearing. A regression-discontinuity design exploits the sharp increase in the weeks of paid leave available under the law. We...

We study the impact of web search personalization on ideological segregation in search results. We deploy 150 synthetic internet users with randomized partisan preferences across 25 US cities. These users generate authentic browsing histories and are active during the US 2020 election and its...

We develop a new approach to measure the sources of geographic goods market segmentation. Our cost-of-living approach uncovers the relative importance of price and product availability differences, while accounting for taste differences. We implement our methodology on regionally disaggregated...