In July 2018, the Walk Free Foundation released the latest Global Slavery Index (GSI), which presents estimates for the number of victims of modern slavery in 167 countries. Using data from the Gallup World Poll’s module on modern slavery, which was conducted in 48 countries, individual and country-level risk factors, and data from the GSI Vulnerability Model, Pablo Diego-Rosell, a senior researcher at Gallup, and Jacqueline Joudo Larsen, the head of research for the Walk Free Foundation, developed a model to generate predicted probabilities of modern slavery on the individual and national levels.