In the case of taxes, multiplier = -c/(1-c)
When government reduces taxes by 200
∆Y = (-c/1-c)* ∆T
= (-0.8/1-0.8)*(- 200)
=( - 4)* (-200)
= 800
So Income will increase only by 800 in this case.
How i proceeded is :
given mpc=.8
so multiplier = 5
now if govt cut taxes by 200 , output rises by 5*200 = 1000
and thu offsets the initial fall
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