Given Ca=20 c=MPC=3/4 Ip=I=20 a; determine equilibrium level of income when there is no government sector b;define equilibrium level of income When government spending is equal to 25 &no taxation c; define equilibrium level of income When government expenditure and tax is equal to 25
a) if no government
Y= C+I
C= a+ bY
= 20+ 0.75Y
Y= 20+ 0.75Y+ 20
Y= 40+ 0.75Y
0.25Y = 40
Y= 160
b) When G= 20
Y= C+I+ G
Y= 20+ 0.75Y+ 20+ 20
Y=60+ 0.75Y
0.25Y= 60
Y= 240
d) when tax = 25
Y= C+I+G
C= 20+ 0.75(Y-25)
Y=20+ 0.75(Y-25)+ 20+20
Y= 60+ 0.75Y-18.75
0.25Y= 41.25
Y= 165
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