The acronym OECD refers to the Organisation for Economic Cooperation and Development, which is an organisation that brings together brings together the governments of the 31 OECD countries in order to "support sustainable economic growth, boost employment, raise living standards, maintain financial stability, assist other countries' economic development, and contribute to growth in world trade". Its governing body is a Council made up of one representative per member country, plus a representative of the European Commission. The Council meets regularly at the level of permanent representatives to OECD and decisions are taken by consensus. The Council meets at ministerial level once a year to discuss key issues and set priorities for OECD work. The work mandated by the Council is carried out by the OECD Secretariat. Representatives of the 31 OECD member countries meet in specialised committees to advance ideas and review progress in specific policy areas, such as economics, trade, science, employment, education or financial markets. There are about 250 committees, working groups and expert groups. Some 40 000 senior officials from national administrations go to OECD committee meetings each year to request, review and contribute to work undertaken by the OECD Secretariat. The Secretariat is made up of some 2 500 staff who support the activities of committees, and carry out the work in response to priorities decided by the OECD Council. The staff includes economists, lawyers, scientists and other professionals. Most staff members are based in Paris but some work at OECD centres in other countries.