This study examines overt restrictions on foreign direct investment (FDI) in the services sector in developing countries and transition economies, drawing on a large number of sources in addition to the General Agreement on Trade in Services (GATS). Restrictions considered include: limitations on foreign ownership, screening or notification procedures, management and operational restrictions. These restrictions are computed for a number of services industries and then aggregated into a single measure for the services sector as a whole for each country. This study is part of an UNCTAD series of publications which seek to examine how transnational corporations and their activities impact on development issues.