This chapter begins the discussion of international finance and macroeconomics—the subject of the rest of the book. Its major purpose is to show how the balance of payments accounts for international transactions and how the different balances (or sub-balances) can be interpreted. It also presents the international investment position.
A country's balance of payments records all economic transactions between the residents of the country and residents of the rest of the world. Each transaction or exchange results in two opposite flows of value. By convention, a credit or positive item is the flow for which the country is paid—it is the item that the country gives up in the transaction, and it sets up a claim on the foreign resident, so that funds (or "money") flow into the country. A debit or negative item is the flow that the country must pay for—it is the item that the country receives in the transaction, and it sets up a foreign claim on a resident of the country, so that funds (or "money") flow out of the country.
Each transaction has both a credit and a debit item—double-entry bookkeeping—at least once we create a fictional "goodwill" item for things that are given away (unilateral or unrequited transfers). Therefore, if we add up all items for the country's balance of payments, it must add up to zero. What we find interesting about the balance of payments is not that it must completely add up to zero, but rather how it does so. What are the values of different categories of items?
Typically, the first categories we examine are items that are international flows of goods (or merchandise), services, income, and gifts—the current account. Services include flows of transportation, financial services, education, consulting, and so forth. Income includes flows of payments such as interest, dividends, and profits. In addition to the full current account balance, we can also examine the goods and services balance.