The trade-to-GDP ratio is an indicator of the relative importance of international trade in the economy of a country. It is calculated by dividing the aggregate value of imports and exports over a period by the gross domestic product for the same period. Although called a ratio, it is usually expressed as a percentage. It is used as a measure of the openness of a country to international trade, and so may also be called the trade openness ratio.: 63  It may be seen as an indicator of the degree of globalisation of an economy.: 64
Other factors aside, the trade-to-GDP ratio tends to be low in countries with large economies and large populations such as Japan and the United States, and to have a higher value in small economies.: 63  Singapore has the highest trade-to-GDP ratio of any country; between 2008 and 2011 it averaged about 400%.: vii
Worldwide trade-to-GDP ratio rose from just over 20% in 1995 to about 30% in 2014.: 17
- Trade Openness. Our World in Data. Archived 16 December 2020.
- Richard L. Harris (2008). Dependency, Underdevelopment, and Neoliberalism; in: Richard L. Harris, Jorge Nef (editors) (2008). Capital, Power, and Inequality in Latin America and the Caribbean. Series: Critical Currents in Latin American Perspective. Lanham: Rowman & Littlefield Publishers. ISBN 9780742555235.
- OECD Science, Technology and Industry Scoreboard 2011: 6. Competing in the Global Economy: 6. Trade openness. Organisation for Economic Co-operation and Development. Accessed November 2015.
- [Trade Policy Review Body] (2012). Trade Policy Review: Report by the Secretariat: Singapore; Revision (Summary). World Trade Organization. Accessed November 2015.
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