Consider two economies (1 and 2) where in equilibrium, the level of aggregate income (Y) is the sum of aggregate investment expenditure (I) and aggregate consumption expenditure (C). I is determined autonomously of Y and its value in economy 1 is double that in economy 2. If the marginal propensity to save in economy 1 is half that in economy 2 for all values of Y, then the equilibrium value of Y – C in economy 1 is A. double that in economy 2 B. half that in economy 2 C. the same as that in economy 2 D. None of the above

ECON MACRO
5th Edition
ISBN:9781337000529
Author:William A. McEachern
Publisher:William A. McEachern
Chapter9: Aggregate Demand
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The correct answer is C. Please prove the result mathematically.

58. Consider two economies (1 and 2) where in equilibrium, the level of aggregate income
(Y) is the sum of aggregate investment expenditure (I) and aggregate consumption
expenditure (C). I is determined autonomously of Y and its value in economy 1 is
double that in economy 2. If the marginal propensity to save in economy 1 is half that
in economy 2 for all values of Y, then the equilibrium value of Y – C i economy 1 is
A. double that in economy 2
B. half that in economy 2
C. the same as that in economy 2
D. None of the above
Transcribed Image Text:58. Consider two economies (1 and 2) where in equilibrium, the level of aggregate income (Y) is the sum of aggregate investment expenditure (I) and aggregate consumption expenditure (C). I is determined autonomously of Y and its value in economy 1 is double that in economy 2. If the marginal propensity to save in economy 1 is half that in economy 2 for all values of Y, then the equilibrium value of Y – C i economy 1 is A. double that in economy 2 B. half that in economy 2 C. the same as that in economy 2 D. None of the above
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