a. What is her ex post income yfail if she fails? NOTE: I'm asking for realized income, NOT utility! b. What is her ex post income ysucceed if she succeeds? (hint: this will be a function of the interest i).

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Chapter1: Making Economics Decisions
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c. Calculate her Expected Utility EUwork if she works hard. (hint: this will be a
function of the interest i).
d. Calculate her Expected Utility EUshirks if she shirks. (hint: this will be a function
of the interest i).
e. Write down the condition under which the borrower will work hard.
f. No-shirking condition: Manipulating the condition you found in e, find the
maximum i for which the borrower is going to work hard. Call this interest i"1.
NOTE: i', will be a number.
Transcribed Image Text:c. Calculate her Expected Utility EUwork if she works hard. (hint: this will be a function of the interest i). d. Calculate her Expected Utility EUshirks if she shirks. (hint: this will be a function of the interest i). e. Write down the condition under which the borrower will work hard. f. No-shirking condition: Manipulating the condition you found in e, find the maximum i for which the borrower is going to work hard. Call this interest i"1. NOTE: i', will be a number.
Consider the problem of an entrepreneur/borrower with no money and a project requiring L=200
to be carried out. Assume that the borrower cannot use his illiquid assets to finance the project.
The entrepreneur
Once the entrepreneur undertakes the project, she decides either to work hard or to shirk.
• If she works hard, then she earns a high return R=$500 with probability p=0.75 and earns
nothing with probability (1-p)=0.25.
• If she shirks, she earns a high return with probability q=0.25 and earns nothing with
probability (1-q)=0.75.
The borrower has ex-post utility u(y)=y-D if she works hard and u(y)=y if she does not work
hard, where y is her income (after loan payments) carned from the project. Assume D=125.
The bank:
A bank is willing to finance the project and lend $200 to the borrower. The bank charges the
agent an interest rate of i on the loan.
The borrower always repays the loan when she succeeds. If she fails, she is protected by limited
liability: she repays nothing to the bank.
Finally, assume that the bank could also purchase $200 in risk-free bonds with a return of
r=0.10, and that the financial markets are perfectly competitive.
Section A1: No collateral
1. The borrower
Suppose the borrower takes a loan of $200 from the bank. Suppose
that the interest rate charged on the loan is i (we'll find i later).
a. What is her ex post income yail if she fails? NOTE: I'm asking for realized
income, NOT utility!
b. What is her ex post income ysuceed if she succeeds? (hint: this will be a function of
the interest i).
Transcribed Image Text:Consider the problem of an entrepreneur/borrower with no money and a project requiring L=200 to be carried out. Assume that the borrower cannot use his illiquid assets to finance the project. The entrepreneur Once the entrepreneur undertakes the project, she decides either to work hard or to shirk. • If she works hard, then she earns a high return R=$500 with probability p=0.75 and earns nothing with probability (1-p)=0.25. • If she shirks, she earns a high return with probability q=0.25 and earns nothing with probability (1-q)=0.75. The borrower has ex-post utility u(y)=y-D if she works hard and u(y)=y if she does not work hard, where y is her income (after loan payments) carned from the project. Assume D=125. The bank: A bank is willing to finance the project and lend $200 to the borrower. The bank charges the agent an interest rate of i on the loan. The borrower always repays the loan when she succeeds. If she fails, she is protected by limited liability: she repays nothing to the bank. Finally, assume that the bank could also purchase $200 in risk-free bonds with a return of r=0.10, and that the financial markets are perfectly competitive. Section A1: No collateral 1. The borrower Suppose the borrower takes a loan of $200 from the bank. Suppose that the interest rate charged on the loan is i (we'll find i later). a. What is her ex post income yail if she fails? NOTE: I'm asking for realized income, NOT utility! b. What is her ex post income ysuceed if she succeeds? (hint: this will be a function of the interest i).
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