Sarah Guan (Ezra Stiles 2023) is an undergraduate student at Yale majoring in economics and mathematics. She joined the internship program during summer 2020 to support research on the impact of Covid-19 on marginalized groups in developing countries. In addition, Sarah researched and wrote about the history and continued impact of developing research at the EGC. She profiled faculty affiliates and wrote research summaries of their academic publications. Sarah is interested in using econometric and machine learning techniques to inform public policy.