Published online by Cambridge University Press: 10 July 2018
Experiments are now common in political science. They are an excellent methodological tool to estimate the causal effect of a treatment on an outcome. In this article, I review the use of lab experiments in political science. After a brief report on their popularity and advantages, I distinguish two ideal-types (economics-based and psychology-based) and outline the main lines of division between them. In the final section, I discuss the main challenges that lab experimentalists are facing today.