Alongside country level data on modern slavery, the 2018 Global Slavery Index includes studies on the top 12 global economies (Australia, Brazil, Canada, China, France, Germany, India, Italy, Japan, Russia, United Kingdom, and the United States).

Besides providing information on the types of modern slavery and vulnerability factors affecting each of these countries, each country study includes information on the statements being produced under the UK Modern Slavery Act, and analized through WikiRate. The studies conclude with a series of policy recommendations by the Walk Free Foundation.