Guido Imbens is a Dutch-American economist known for his work in causal inference and econometrics. He is a professor at Stanford University and has contributed significantly to the development of methods for estimating causal effects in observational studies. His research often focuses on how to draw valid conclusions from data when randomization is not possible. In 2021, Imbens was awarded the Nobel Prize in Economic Sciences alongside Joshua Angrist and David Card for their contributions to the understanding of causal relationships in economics. His work has had a profound impact on various fields, including public policy and social sciences, by providing tools to analyze complex data.