Many countries work together. 
Many lands work together as a big team. 

The OECD is a group of 38 countries. 

Today, many OECD members are wealthy nations. They work together to solve common problems. They also share good ways to run a country. The group helps set rules for world trade. One big job is making tax rules. In 2021, many countries agreed on a new tax plan. This plan asks large companies to pay at least 15% in tax. This helps governments get more money to help people. 
The Organisation for Economic Co-operation and Development is a group of 38 countries. 


Many members are developed and high-income nations. 
The group has a long history in Europe. 
The OECD officially began in September 1961. 

Today, the OECD helps set important global rules. One big job is managing international taxes. In July 2021, many nations agreed to a new plan. This is called a global minimum corporate tax. It sets a tax rate of at least 15%. This stops companies from moving to places with tiny taxes. This plan helps governments collect more money. They hope to get $100 billion to $240 billion each year. The OECD also acts as an observer for the United Nations. This keeps the group connected to the whole world.
The Organisation for Economic Co-operation and Development, known as the OECD, is an intergovernmental organisation. 
Most OECD members are high-income, developed economies. They possess a very high Human Development Index, which measures quality of life. The collective population of these members is 1.38 billion people. The average life expectancy in these nations is 80 years. The median age is 40, which is higher than the global average of 30. These nations hold massive economic power. They comprise 62.2% of global nominal GDP, totaling USD 49.6 trillion. At purchasing power parity, they represent 42.8% of global GDP, or Int$54.2 trillion.
The OECD has a deep history rooted in post-war Europe. It began as the Organisation for European Economic Co-operation, or OEEC. The OEEC was established in April 1948. Its primary goal was allocating American Marshall Plan aid. This aid helped rebuild Europe after World War II. 
The OECD officially superseded the OEEC in September 1961. 
The organisation has expanded significantly through various stages of reform. After the Revolutions of 1989, the OECD helped Central European countries. They assisted with market economy reforms in the Visegrád Group. This led to the membership of Poland, Hungary, the Czech Republic, and Slovakia. South Korea and Mexico also joined between 1996 and 2000. 
One of the most important roles of the OECD involves international taxation. The organisation sets rules for how multinational companies pay taxes. 

The OECD also performs multilateral surveillance to monitor economic trends. This involves regular peer reviews and policy assessments. They use committees and the Economics Department to study data. The organisation also creates specialized agencies to handle specific global issues. These include the International Energy Agency and the Financial Action Task Force. The OECD is also an official observer for the United Nations. This helps connect its economic work to the broader global community.
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