 In this category belong studies such as Understanding Society and the Millennium Cohort Study.The Archive also provides access to important international macrodata series (aggregate data) such as those held by the Organisation for Economic Co-operation and Development (OECD), International Monetary Fund (IMF) and World Bank via its partnership with Mimas.The UK Data Archive ensures that the data will be available not just to current researchers but also to future researchers through digital preservation and migration to new storage media as technology evolves.