Final answer:
The concept of transfer completion in goods or services is tied to customer control and is integral to understanding trade balances, involving resources that have been produced and are used in the production of other goods or services, along with unilateral transfers in the current account balance.
Step-by-step explanation:
The transfer of goods or services is considered complete when the customer gains control over the goods or services. This typically occurs when the resource has been produced and is capable of being used to produce other goods and services. In the context of international trade, this involves the measurement of trade balances, where the current account balance includes trade in goods, services, and unilateral transfers.
Unilateral transfers refer to one-way payments that governments, private entities, or individuals make abroad without receiving anything in return. These are part of the broader economic activity of a country and influence the overall trade and current account balances by acting as outflows in the balance of payments.