In calculating gross national product (GDP), consumer purchases are processed in four ways: personal consumption expenditures, government consumption expenditures, investment expenditures and net exports.
1. Calculate personal consumption expenditure: Personal consumption expenditure includes consumer expenditures for purchasing goods and services, such as food, clothing, housing, medical care, education, etc. The sum of these expenditures can be obtained through statistics and surveys to obtain consumer expenditure data.
2. Calculate government consumption expenditure: Government consumption expenditure includes goods and services purchased by the government, such as public security, education, medical care, infrastructure construction, etc. The sum of these expenditures is available from government budget and financial data.
3. Calculate investment expenditure: Investment expenditure includes fixed asset investment by enterprises and individuals for production and operation, such as houses, machinery and equipment, land, etc. The sum of these expenditures can be obtained from business and personal financial data.
4. Calculate net exports: Net exports refer to the difference between exports minus imports. If a country's total exports exceed its total imports, net exports are positive, otherwise they are negative. These data are available through customs and trade data.