Essentials of Economics 7th Edition by Gregory Mankiw

تمرين 5

Economists in Funlandia, a closed economy, have collected the following information about the economy for a particular year:
Y = 10,000
C = 6,000
T = 1,500
G = 1,700
The economists also estimate that the investment function is:
I = 3,300 2 100 r ,
where r is the country's real interest rate, expressed as a percentage. Calculate private saving, public saving, national saving, investment, and the equilibrium real interest rate.