The most common method to measure flows of trade is the comparison between the exportation of merchandise, services, and the capital of the countries.
Trade is the situation where the countries buy (import) from or sell (export) to the countries outside the boundaries of their own territories.
Exports referred to the scenario where one country provides goods and services to another country abroad. The comparison of goods, services, and monetary capital of foreign countries with respect to their own countries can be used as a common method to measure the trade flows.
Therefore, the exporting of goods, services, and capital to other countries is the method to determine trade flows.
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