Please no written by hand solution Consider an economy that is composed of individuals who live for two periods, and who have thefollowing preferences over consumption in period 1 (C₁) and period 2 (C2):U=In(C₁) + In(C₂)These individuals all receive an income Y in period 1, and no income in period 2. They can save asmuch of their period 1 income as they like in bank accounts, earning a real interest rate equal to r.a) How much will a typical individual choose to save under this system? [Hint: First find the budgetconstraint relating consumption in the second period to consumption in the first period. Solve foroptimal consumption in period 1, and then back out optimal savings.]b) Now, the government decides to set up a social security system. This system will take a (small)amount, T, from each individual in the first period, put it in the bank, and transfer it to them (withinterest) in the second period. What does this do to the amount of savings done by individuals? Whatdoes it do to total savings in society? What do we call this type of social security system?c) Now assume that instead of putting the money from the tax (7) in the bank, the government simplytransfers it from the current young to the current old in any period (keep assuming that I' is small).Assume that the population grows at n% per period, and that there is no wage growth (g=0). (Whatdo we call this type of social security system?) Solve for consumption in period 1 for individuals whoenter period 1 after this social security system is already in place. How much will individuals chooseto save in period 1 under this system? [Hint: there are different returns on private investment and ontaxes paid to the social security system. Your answer should be in terms of the problem's parameters].d) How do savings by individuals under the system in c) compare to savings by individuals underthe systems in a) and b) under the following three cases:i)n=rn>rn

Utility function: U=ln(C1)+ln(C2) Budget Constraint C1 + S = Y

Answered: Consider an economy that is composed of…

Consider an economy that is composed of individuals who live for two periods, and who have the following preferences over consumption in period 1 (C₁) and period 2 (C2): U=In(C₁) + In(C₂)

ENGR.ECONOMIC ANALYSIS

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Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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Question

Please no written by hand solution

Consider an economy that is composed of individuals who live for two periods, and who have the
following preferences over consumption in period 1 (C₁) and period 2 (C2):
U=In(C₁) + In(C₂)
These individuals all receive an income Y in period 1, and no income in period 2. They can save as
much of their period 1 income as they like in bank accounts, earning a real interest rate equal to r.
a) How much will a typical individual choose to save under this system? [Hint: First find the budget
constraint relating consumption in the second period to consumption in the first period. Solve for
optimal consumption in period 1, and then back out optimal savings.]
b) Now, the government decides to set up a social security system. This system will take a (small)
amount, T, from each individual in the first period, put it in the bank, and transfer it to them (with
interest) in the second period. What does this do to the amount of savings done by individuals? What
does it do to total savings in society? What do we call this type of social security system?
c) Now assume that instead of putting the money from the tax (7) in the bank, the government simply
transfers it from the current young to the current old in any period (keep assuming that I' is small).
Assume that the population grows at n% per period, and that there is no wage growth (g=0). (What
do we call this type of social security system?) Solve for consumption in period 1 for individuals who
enter period 1 after this social security system is already in place. How much will individuals choose
to save in period 1 under this system? [Hint: there are different returns on private investment and on
taxes paid to the social security system. Your answer should be in terms of the problem's parameters].
d) How do savings by individuals under the system in c) compare to savings by individuals under
the systems in a) and b) under the following three cases:
i)
n=r
n>r
n<r
Explain your findings in each case. How do total societal savings in c) compare to total societal
savings in a) and b)?
ii)
iii)

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