In a historical period in which the environmental consciousness is finally becoming a day-to-day topic, it is interesting to understand how countries can measure the effectiveness and the stringency of their decisions in terms of regulations. Observing the enormous flow of capital going into less controlled countries, researchers have interrogated themselves trying to find connections between economic instruments as the Foreign Direct Investments (FDI), the environmental regulatory stringency, and the corruptibility of a certain host country. Among the numerous contributions brought by the literature, we decided to replicate the approach conducted by Cole et al. in the paper “Endogenous Pollution Havens: Does FDI Influence Environmental Regulations?”.