Question

In: Economics

You rent a room with a nice ocean view in a house on Del Playa. Last...

You rent a room with a nice ocean view in a house on Del Playa. Last week’s storms severely eroded
the sea cliffs and your friend (the engineering major) estimates that there is a 50% chance that they
will collapse and you will lose all of your possessions, valued at $100. You can sell off some of your
belongings to buy some insurance against this risk, for the price of p dollars for every dollar of insurance.

Now suppose that your utility of wealth is given by u(c) = c. Write your new MRS. How much
insurance would you buy if p = .4? If p = .6?

Could you explane in detail,Please? And could you also graph it?

thank you!

Solutions

Expert Solution

Let cc denote your wealth if the cliffs collapse and cnc denote your wealth if they do not collapse. The state contingent budget constraint is,

cnc+ (p/1−p) cc = 100

MRS = - cnc /cc = -1 as cnc = cc

MRS = −1. If p = .4, you spend all you money on insurances, meaning buy $250 of insurance (k = 250). If p = .6, you won’t buy any insurance (k = 0).

u(c) = c, implies you are risk neutral. This means that your consumption levels in the two states are perfect substitutes and you should try to maximize your expected consumption. Having $1 of insurance gives you an expected payout of $0.50, because there is a 50% chance of the collapse. When p = 0.4, it costs less than $0.50 to buy a dollar of insurance,you will buy as much as you can, because each dollar of insurance increases your expected c. Whereas, when p = 0.6, it costs more than $0.50, you won’t buy any, because each dollar of insurance lowers your expected c.


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