Définition
In 1961, the Organisation for Economic Cooperation and Development (OECD) succeeded the Organisation for European Economic Cooperation (OEEC), founded in 1948 to manage post-war American aid (Marshall Plan).
The OECD includes around 30 countries: the whole of Western Europe and North America, plus Japan, Australia, New Zealand, Korea and, since 1995 and 1996, certain Central European countries (Czech Republic, Hungary, Poland) and since 2010 Chile, Slovenia, Israel, and Estonia.
The OECD is the principal gatherer of statistics on developed countries. It is headquartered in Paris.