Problem 4: The table describes a 10-person economy. Each person in this economy has 1 dollar that he might save or
consume. He saves only if he can obtain a return on savings at least as high as the rate indicated in the first column. Each
person also has access to an investment project paying the return listed in the second column. He is willing to undertake
the investment using his own savings only if the return on his investment is at least as high as the return he requires to
make saving attractive. He is willing to undertake the investment using a loan from a financial intermediary only if the
investment pays a return greater than or equal to the interest rate he must pay on the loan. He prefers to finance the
investment out of his own savings rather than a loan (if available) only if the return he requires to render saving
attractive is lower than the interest rate he must pay on a loan.
Saves If
Available Investment
Person
Return 2 (Percent) Return (Percent)
5
5
1
5
2
8
3
5
9
4
8
5
5
8
5
8
5
6
7
10
9
8
10
10
9
9
20
20
10
15
a. Assume first that the costs of carrying out financial transactions are so high that no borrowing or lending takes place.
As a result, the only way a person can earn a return on savings is by investing in his own investment project. Which
people will invest in this case? What is the simple average of the returns on the investments undertaken?