The long-run collective supply curve shifts right if productivity increases or the price of key inputs decrease. It makes the combination of the lower inflation, higher output and lower unemployment.
What is aggregate supply?
Aggregate supply is also called total output, it is the total production of the goods and services within an economy at the overall price at the given period.
The main two elements of aggregate supply are consumption and saving. The sum up of the national supply is the consumption expenditure and savings.
Thus, The long-run collective supply curve shifts right if productivity
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