Imports, along with exports, form the basics of international trade. Import of goods normally requires involvement of the customs authorities in both the country of import and the country of export and are often subject to import quotas, tariffs and trade agreements. When the "imports" are the set of goods and services imported, "Imports" also means the economic value of all goods and services that are imported. The macroeconomic variable I usually stands for the value of these imports over a given period of time, usually one year.[citation needed]
"Imports" consist of transactions in goods and services (sales, barter, gifts or grants) from non-residents residents to residents.[3] The exact definition of imports in national accounts includes and excludes specific "borderline" cases. [4] A general delimitation of imports in national accounts is given below: * An import of a good occurs when there is a change of ownership from a non-resident to a resident; this does not necessarily imply that the good in question physically crosses the frontier. However, in specific cases national accounts impute changes of ownership even though in legal terms no change of ownership takes place (e.g. cross border financial leasing, cross border deliveries between affiliates of the same enterprise, goods crossing the border for