The '''Organisation for Economic Co-operation and Development''' ('''OECD'''; {{lang-fr|Organisation de coopération et de développement économiques, '''OCDE'''}}) is an [[international organization|intergovernmental organisation]] with 38 member countries,<ref name=membership/><ref name="38 countries">{{cite news |last1=Shields |first1=Bevan |title=Mathias Cormann confirmed as a frontrunner for OECD post following candidate cull |url=https://www.smh.com.au/world/europe/mathias-cormann-confirmed-as-frontrunner-for-oecd-post-following-candidate-cull-20210113-p56tx5.html |access-date=11 September 2022 |work=[[The Sydney Morning Herald]] |date=13 January 2021 |language=en |quote=OECD's 38 member countries.}}</ref> founded in 1961 to stimulate economic progress and [[international trade|world trade]]. It is a [[forum (legal)|forum]] whose member countries describe themselves as committed to [[democracy]] and the [[market economy]], providing a platform to compare policy experiences, seek answers to common problems, identify good practices, and coordinate domestic and international policies of its members.
The majority of OECD members are [[World Bank high-income economy|high-income economies]] ranked as "very high" in the [[Human Development Index]], and are [[industrialized country|industrialized countries]]. {{asof|2024}} their collective population is 1.38 billion<ref>{{cite web |last= |first= |date= |title=Population, total – OECD members |url=https://data.worldbank.org/indicator/SP.POP.TOTL?locations=OE }}</ref> people with an average life expectancy of 80 years and a [[median age]] of 40, against a global average of 30.<ref>{{Cite web |title=OECD Economic Data {{!}} Data |url=https://www.worldeconomics.com/Regions/OECD/default.aspx |access-date=2024-03-22 |website=World Economics}}</ref> {{As of|2017}}, OECD Member countries collectively comprised 62.2% of [[list of countries by GDP (nominal)|global nominal GDP]] ([[United States dollar|USD]] 49.6 trillion)<ref name="GDP IMF">{{cite web|url=https://www.imf.org/en/Publications/SPROLLS/world-economic-outlook-databases|title=World Economic Outlook Database|date=17 April 2018|publisher=[[International Monetary Fund]]}}</ref> and 42.8% of global [[gross domestic product|GDP]] ([[International dollar|Int$]]54.2 trillion) at [[List of countries by GDP (PPP)|purchasing power parity]].<ref name="imf1">{{cite web|url=https://www.imf.org/external/pubs/ft/weo/2018/01/weodata/weorept.aspx?pr.x=43&pr.y=19&sy=2017&ey=2017&scsm=1&ssd=1&sort=country&ds=.&br=1&c=512%2C672%2C914%2C946%2C612%2C137%2C614%2C546%2C311%2C962%2C213%2C674%2C911%2C676%2C193%2C548%2C122%2C556%2C912%2C678%2C313%2C181%2C419%2C867%2C513%2C682%2C316%2C684%2C913%2C273%2C124%2C868%2C339%2C921%2C638%2C948%2C514%2C943%2C218%2C686%2C963%2C688%2C616%2C518%2C223%2C728%2C516%2C558%2C918%2C138%2C748%2C196%2C618%2C278%2C624%2C692%2C522%2C694%2C622%2C142%2C156%2C449%2C626%2C564%2C628%2C565%2C228%2C283%2C924%2C853%2C233%2C288%2C632%2C293%2C636%2C566%2C634%2C964%2C238%2C182%2C662%2C359%2C960%2C453%2C423%2C968%2C935%2C922%2C128%2C714%2C611%2C862%2C321%2C135%2C243%2C716%2C248%2C456%2C469%2C722%2C253%2C942%2C642%2C718%2C643%2C724%2C939%2C576%2C644%2C936%2C819%2C961%2C172%2C813%2C132%2C199%2C646%2C733%2C648%2C184%2C915%2C524%2C134%2C361%2C652%2C362%2C174%2C364%2C328%2C732%2C258%2C366%2C656%2C734%2C654%2C144%2C336%2C146%2C263%2C463%2C268%2C528%2C532%2C923%2C944%2C738%2C176%2C578%2C534%2C537%2C536%2C742%2C429%2C866%2C433%2C369%2C178%2C744%2C436%2C186%2C136%2C925%2C343%2C869%2C158%2C746%2C439%2C926%2C916%2C466%2C664%2C112%2C826%2C111%2C542%2C298%2C967%2C927%2C443%2C846%2C917%2C299%2C544%2C582%2C941%2C474%2C446%2C754%2C666%2C698%2C668&s=PPPGDP&grp=0&a=|title=Report for Selected Country Groups and Subjects (PPP valuation of country GDP)|publisher=IMF|access-date=9 May 2018}}</ref> The OECD is an official [[United Nations General Assembly observers|United Nations observer]].<ref>{{cite web|url=https://www.un.org/en/sections/member-states/intergovernmental-organizations/index.html|title=Intergovernmental Organizations|website=United Nations |url-status=dead |archive-url=https://web.archive.org/web/20181202024809/https://www.un.org/en/sections/member-states/intergovernmental-organizations/index.html |archive-date= Dec 2, 2018 }}</ref> OECD nations have strong [[Welfare|social security systems]]; their average [[Welfare state|social welfare spending]] stood at roughly 21% of GDP.<ref name="Kenworthy">{{Cite journal |jstor = 3005973|title = Do Social-Welfare Policies Reduce Poverty? A Cross-National Assessment|journal = Social Forces|volume = 77|issue = 3|pages = 1119–1139|last1 = Kenworthy|first1 = Lane|year = 1999|doi = 10.2307/3005973|url = http://www.lisdatacenter.org/wps/liswps/188.pdf|archive-url = https://web.archive.org/web/20130810134045/http://www.lisdatacenter.org/wps/liswps/188.pdf|archive-date = 10 August 2013|url-status = live}}</ref><ref name="Bradley et al.">{{Cite journal |jstor = 3088901|title = Determinants of Relative Poverty in Advanced Capitalist Democracies|journal = American Sociological Review|volume = 68|issue = 1|pages = 22–51|last1 = Moller|first1 = Stephanie|last2 = Huber|first2 = Evelyne|last3 = Stephens|first3 = John D.|last4 = Bradley|first4 = David|last5 = Nielsen|first5 = François|year = 2003|doi = 10.2307/3088901}}</ref><ref>{{Cite web | url=https://www.oecd.org/social/expenditure.htm | title=Social Expenditure – Aggregated data|work=[[Organisation for Economic Co-operation and Development]]}}</ref>
The OECD's headquarters are at the [[Château de la Muette]] in [[Paris]], France, which housed its predecessor organization, the Organization for European Economic Co-operation.<ref>{{cite web|title=Getting to the OECD|url=http://www.oecd.org/site/conferencecentre/gettingtotheoecd.htm |publisher=OECD|access-date=28 April 2016}}</ref> The OECD is funded by contributions from member countries at varying rates and had a total budget of [[Euro|€]]338.3 million in 2023,<ref name="budget" /> and is recognised as a highly influential publisher of mostly economic data through publications as well as annual evaluations and rankings of member countries.<ref>{{Cite web|title=Organisation for Economic Co-operation and Development|url=https://www.britannica.com/topic/Organisation-for-Economic-Co-operation-and-Development|access-date=2020-09-08|website=Encyclopedia Britannica|language=en}}</ref>
