#4 Suppose your friend asks to borrow $100 from you and says he will pay you back in a year at an interest rate of 5% (suppose that you can trust him). You have three options: (A) to lend him the money, (B) to keep the money in cash under your floorboards, or (C) to put it into a bank account that adjusts for inflation. a) What must the inflation rate be for you to be retroactively indifferent between option A and option C? bl. Suppose it is 2021 and you have to make the decision You do not know what inflation will

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Chapter1: Making Economics Decisions
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#4 Suppose your friend asks to borrow $100 from you and says he will pay you back in a year at
an interest rate of 5% (suppose that you can trust him). You have three options: (A) to lend him
the money, (B) to keep the money in cash under your floorboards, or (C) to put it into a bank
account that adjusts for inflation.
a) What must the inflation rate be for you to be retroactively - indifferent between option A
and option C?
b) Suppose it is 2021 and you have to make the decision. You do not know what inflation will
be, but expected inflation is 3%. Which option should you choose? Which is the worst option?
c) Suppose it is now 2022, actual inflation was 6%, and you chose according to part (b). Did you
make the best choice? If you could choose again with the information you now have, what
option would you choose?
Transcribed Image Text:#4 Suppose your friend asks to borrow $100 from you and says he will pay you back in a year at an interest rate of 5% (suppose that you can trust him). You have three options: (A) to lend him the money, (B) to keep the money in cash under your floorboards, or (C) to put it into a bank account that adjusts for inflation. a) What must the inflation rate be for you to be retroactively - indifferent between option A and option C? b) Suppose it is 2021 and you have to make the decision. You do not know what inflation will be, but expected inflation is 3%. Which option should you choose? Which is the worst option? c) Suppose it is now 2022, actual inflation was 6%, and you chose according to part (b). Did you make the best choice? If you could choose again with the information you now have, what option would you choose?
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