Anyone know how to do this question?
1. An increase in investment of $5000 incraesed the equilibrium level of national income by $20000. What is the marginal propensity to consume?
How do I apply the formula. Anyone have formulas? Is Ad the same as C?
Change in Y = k * change in AD
which means k = 20000/5000 = 4.
from the formula of simple multiplier MPS = 1/4 = 0.25
MPC = 1 - MPS = 1 - 0.25 = 0.75
2. the answer is 0.75
also how do you do:
View attachment 40711
the size of the subsidy is the vertical gap between the two curves so 12 - 10 = $2
and
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MPS = (600-500)/(2000-15000 = 0.2
k = 1/0.2 = 5
from formula in the first question, 1000/5 = $200
And
View attachment 40709
after the changes, it can be determined that a tariff of $2 is imposed on top of world price. before this change, gov revenue was zero meaning no imports were coming into the country. the increase in foreign producer revenue means that its a quota because now 200 imports are allowed