Aggregate demand refers to the total amount of goods and services that all sectors of an economy are willing and able to purchase at a given price level and period of time.
Think of aggregate demand as a shopping list for the entire economy. Just like how you make a list of things you want to buy, aggregate demand represents the combined desires of consumers, businesses, and the government to purchase goods and services.
Consumption: The spending by households on goods and services.
Investment: The spending by businesses on capital goods such as machinery or buildings.
Government spending: The expenditures made by the government on public goods and services.
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