This is a PhD-level field course on experimental economics, with an emphasis on field experiments. We will discuss how experimentation can be used to test economic theories and investigate social phenomena. The goal is to teach students how to critically consume the experimental literature, as well as design, implement, and analyze their own experiments. The course will consist of lectures, discussions of research papers, as well as a final project that could become a dissertation chapter. The background for the course is graduate-level microeconomic theory and econometrics.