UK Data Service This link opens in a new windowThe UK’s largest collection of social, economic and population data sources.Includes major UK government-sponsored surveys, cross-national surveys, longitudinal studies, UK census data, international aggregate, business data, and qualitative data. Intergovernmental organisations include International Monetary Fund (IMF), Office for Economic Cooperation and Development (OECD) and the World Bank. Research institutes include NatCen, Institute for Social and Economics Research (ISER) and the Centre for Longitudinal Studies (CLS) among many others.