Aggregate demand In macroeconomics, Aggregate Demand (AD) or Domestic Final Demand (DFD) is the total demand for final goods and services in an economy at a time.[1] This is the demand for the gross domestic product of a country. It shows the amount of goods and services that will be bought at all possible different prices.[2] References - ↑ Sexton, Robert; Fortura, Peter (2005). Exploring Economics. ISBN 0-17-641482-7. This is the sum of the demand for all final goods and services in the economy. It can also be seen as the quantity of real GDP demanded at different price levels. - ↑ O'Sullivan, Arthur; Steven M. Sheffrin (2003). Economics. Upper Saddle River, New Jersey: Savvas Learning Company. p. 307. ISBN 0-13-063085-3. Archived from the original on 2016-12-20. Retrieved 2019-10-03. Other websites - Elmer G. Wiens: Classical & Keynesian AD-AS Model - An on-line, interactive model of the Canadian Economy.