4. Consider an individual who lives for 2 periods and each period receives a constant income of $y pesos, which every period he can spend on a single consumer good c (you may normalize the price of this good to 1). She can save/borrow using perfect credit markets with the market interest rate of r. Her preferences can be represented by a strictly quasi-concave utility function U (xo, ¤1) = /x3 + Bx{ %3D a) are these preferences additively separable? monotone? convex? b) derive the conditions for utility maximization c) under which conditions on B and r would she choose to borrow in the first period and under which conditions she would choose to save?
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- Anya has a two-period horizon. She has the utility functionu (c1,c2) = 2ln(c1) + ln(c2), where cj is her consumption in period j. Her income is Mj in period j. Assume that M1= 7,000 and M2=9,600. The interest rate at which she can borrow and lend is 20%. (i) Find the equation for Anya’s budget line. (ii) Find her optimal bundle. (iii) Explain whether her utility would rise or fall if the interest rate were to fall slightly. (iv) Now suppose that the interest rate is again 20% and Anyahas M1= 0 and M2= 18,000.Explain why her optimal bundles here and in (ii) are related as they are. *just answer part iv.Anya has a two-period horizon. She has the utility functionu (c1,c2) = 2ln(c1) + ln(c2), where cj is her consumption in period j. Her income is Mj in period j. Assume that M1= 7,000 and M2=9,600. The interest rate at which she can borrow and lend is 20%. (i) Find the equation for Anya’s budget line. (ii) Find her optimal bundle. (iii) Explain whether her utility would rise or fall if the interest rate were to fall slightly. (iv) Now suppose that the interest rate is again 20% and Anyahas M1= 0 and M2= 18,000.Explain why her optimal bundles here and in (ii) are related as they are.Consider the intertemporal consumption problem of Mr Cronus between two periods, say this yearand next year. His utility function takes the form U (c1; c2) = pc1 +0:97pc2, where c1 and c2 arehis consumption this and next year respectively. It can be shown (and you do not have to) thatthis utility function satis es diminishing marginal rate of substitution.His yearly income is stable at 100 unit (let say a unit is ten-thousand). He faces di¤erent interestrates between borrowing and saving. Speci cally, the saving interest rate is 0:02, whereas theborrowing interest rate is 0:04.(a) Describe the budget set facing Mr Cronus.(b) Is Mr Cronus a borrower? Explain your answer.(c) Is Mr Cronus a saver? Explain your answer.
- 5. Suppose interest rates are zero and the consumer's utility is u(c_{1}, c_{2}) = (c_{1}, c_{2}) while the two incomes are (y_{1}, y_{2}) = (75, 125) . Find the optimal consumption in each period , and also indicate what financial transactions the consumer makes . Show the answers on a diagram .7 Consider a model in which an individual lives only two periods. This person has diminishing marginal utility of consumption and receives an income of $20,000 in period 1 and an income of $5,000 in period 2. The private interest rate is 10 percent per period, and this person can borrow or lend money at this rate. Also assume that this person intends to consume all of his income over his lifetime. a. Give a hypothetical numerical example of what a person’s optimal consumption would be over these two periods. In answering this question, what assumptions did you make?***PLEASE READ THE QUESTIONS CAREFULLY - EACH HAS MULTIPLE REQUIREMENTS*** Given: Barbara has an income of $2000 this year, and she expects an income of $1100 next year. She can borrow and lend money at an interest rate of 10%. Consumption goods cost $1 per unit this year and there is no inflation. a. Suppose that Barbara’s utility function is U=C1C2 where the marginal rate of substitution is −?2/?1. Sketch the indifference curve and find the tangent point. How much will Barbara consume in each period? Will she borrow or save in the first period? b. If the interest rate went up to 20%: Will she save or borrow? How does the amount compare to your answer in part a?
- Title Suppose that Lynn enjoys coconut oil in her coffee. She has very particular preferences, and she mus Description Suppose that Lynn enjoys coconut oil in her coffee. She has very particular preferences, and she must have exactly two spoonfuls of coconut oil for each cup of coffee. Let C be the number of cups of coffee, and O be the number of spoonfuls of coconut oil. Also, let PC be the price of a cup of coffee. Suppose Lynn has $12 to spend on coffee and coconut oil. Also, the price of coconut oil is $.50 per spoonful.a) Graph Lynnâs Price Consumption Curve for prices, PC = $1, PC = $2, and PC = $3. Please put the number of cups of coffee on the horizontal axis, and the number of spoonfuls of coconut oil on the vertical axis. Be sure to label your graph carefully and accurately.b) Graph Lynnâs demand curve for coffee. You may assume that both coconut oil and coffee are continuous variables so she can consume any amount of coffee and coconut oil that she could afford.…An experimental subject has reference-dependent preferences over mugs and money. Letconsumption in mugs and money be c1 and c2, respectively, and let the reference point inmugs and money be r1 and r2, respectively. Then, the person’s utility is given byv(3c1 − 3r1) + v(c2 − r2) (1)where v(x) = x for x ≥ 0 and v(x) = 3x for x < 0. Normalize the person’s initial amountof money to zero, and suppose she starts off with zero mugs.a) What feature(s) of the prospect-theory value function does v capture? Whatfeature(s) does it not capture?b) According to the above utility function, who is better off: a person whosereference point is to get nothing and gets nothing, or one whose reference point is toget $1,000 and gets $1,000? Is there something weird about this? If so, how couldyou modify the utility function to make it more realistic (while still capturing thesame features of prospect theory)? Use the original utility function for the rest of theproblem.c) Calculate the person’s buying…Consider a two-period consumption saving model and let f1 and f2 denote the first and secondperiod consumption, respectively. Assume that the interest rate at which the consumer may lend or borrowis 10%. Suppose that a consumer’s utility function is x (f1> f2) = f1 + 20√f2= The consumer first periodincome is L1 = $100 and the present value of her income stream is $330=(a) What is the optimal consumption stream (consumption bundle) of this consumer?(b) Is this consumer borrower or lender? How much does she borrow or lend?(c) What is the effect of a reduction of the interest rate to 5% on the consumer’s optimal first-periodsaving? (Make sure to take into account the effect of the decline in the interest rate on the present value ofthe consumer’s income stream.)
- During any year, I can consume any amount that doesnot exceed my current wealth. If I consume c dollars duringa year, I earn ca units of happiness. By the beginning of thenext year, the previous year’s ending wealth grows by afactor k.a Formulate a recursion that can be used to maximizetotal utility earned during the next T years. Assume Ioriginally have w0 dollars.b Let ft(w) be the maximum utility earned during years t, t 1, . . . , T, given that I have w dollars at the be-ginning of year t; and ct(w) be the amount that should be consumed during year t to attain ft(w). By workingbackward, show that for appropriately chosen constantsat and bt,ft(w) btwa and ct(w) atwInterpret these results.Josh is playing blackjack for real money. He has reference-dependent preferences over money: if his earnings are m and his reference point is r, then his utility is v(m − r), where the value function v satisfies v(x) = ln(x + 1) for x ≥ 0, and v(x) = −2 ln(−x + 1) for x ≤ 0. assume that Josh’s reference point is 0 Euro (that is, no wins or losses) and for the given situation, answer the following questions: (i) What is the g for which Josh would be indifferent between taking a fifty-fifty win g Euro or lose 5 Euro gamble? (ii) Does this reflect risk loving or risk averse behavior? (iii) What feature of Josh’s reference-dependent preferences is driving this choice?LIDLCII Real Interest Rate 8% re 6% USA * Supply 8% 6% 3% Not enough information Demand Q of LF Suppose that after the change illustrated, people in China begin saving more money in American assets. Which of the following is a reasonable interest rate that would ensue from this new change?