The following videos explore the aggregate expenditure model in detail. You will analyze planned expenditures relative to actual output using the Keynesian Cross and will see how a change in government spending can lead to a new equilibrium. The model also introduces the spending multiplier and shows how it links aggregate demand factors with the ultimate level of GDP in the economy.
Khan Academy, https://www.khanacademy.org/economics-finance-domain/macroeconomics/income-and-expenditure-topic/macroeconomics-the-keynesian-cross/v/keynesian-cross?utm_campaign=macroeconomics&utm_medium=Desc&utm_source=YT;
https://www.youtube.com/watch?v=xF_Z4QK0tsA; and https://www.khanacademy.org/economics-finance-domain/macroeconomics/income-and-expenditure-topic/macroeconomics-the-keynesian-cross/v/keynesian-cross-and-the-multiplier?utm_campaign=macroeconomics&utm_medium=Desc&utm_source=YT
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