2. Two players have to divide a perfectly divisible cake of size 2. Half of the cake is made of chocolate, while the other half is made of marzipan. If a piece of cake contains a units of chocolate cake and y units of marzipan, player 1 gets utility U(x, y) = x + y, from this piece, while player 2 gets utility V(x, y) = 2x+y, from this piece. That is, player 1 cares only about the total size of the piece, while player 2 is values chocolate twice as much as marzipan. The players use the divide-and-choose protocol one player divides the cake into two, and the other chooses one of the two pieces. More precisely, the divider splits the cake into two pieces (x, y) and (1-2, 1-y) (where 0≤x≤ 1 and 0 ≤ y ≤ 1. The chooser may choose either the piece (x, y) or the piece (1-2, 1-y). a) Use backwards induction to prove (or argue for) the the following claim: "In any subgame perfect equilibrium, the chooser is indifferent between the two pieces." Solve by backwards induction, for the subgame perfect equilibrium when: b) player 2 divides. c) player 1 divides. d) Docs a player prefer to be a divider or a chooser? Explain why, briefly.

2. Two players have to divide a perfectly divisible cake of size 2. Half of the cake is made of chocolate, while the other half is made of marzipan. If a piece of cake contains a units of chocolate cake and y units of marzipan, player 1 gets utility U(x, y) = x + y, from this piece, while player 2 gets utility V(x, y) = 2x+y, from this piece. That is, player 1 cares only about the total size of the piece, while player 2 is values chocolate twice as much as marzipan. The players use the divide-and-choose protocol one player divides the cake into two, and the other chooses one of the two pieces. More precisely, the divider splits the cake into two pieces (x, y) and (1-2, 1-y) (where 0≤x≤ 1 and 0 ≤ y ≤ 1. The chooser may choose either the piece (x, y) or the piece (1-2, 1-y). a) Use backwards induction to prove (or argue for) the the following claim: "In any subgame perfect equilibrium, the chooser is indifferent between the two pieces." Solve by backwards induction, for the subgame perfect equilibrium when: b) player 2 divides. c) player 1 divides. d) Docs a player prefer to be a divider or a chooser? Explain why, briefly.

Microeconomic Theory

12th Edition

ISBN:9781337517942

Author:NICHOLSON

Publisher:NICHOLSON

Chapter4: Utility Maximization And Choice

Section: Chapter Questions

Problem 4.11P

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Consider an economy composed of 16 consumers. Of these, 5 consumers each own one right shoe and 11 consumers each own one left shoe. Shoes are indivisible. Everyone has the same utility function, which is Min(2R, L}, where R and L are, respectively, the quantities of right and left shoes con sumed. A) (10%) Is the status quo (where each individual has his own shoe) Pareto efficient? If so, briefly explain why. If not, provide a Pareto improvement b) (10%) Characterize all Pareto efficient allocations
Reese thinks peanut butter and chocolate are great when separate, but when they combine they are even more epic. In other words, Reese likes to eat either peanut butter or chocolate, but when he eats them together, he gets additional satisfaction from the combination. His preference over peanut butter (x) and chocolate (y) is represented by the utility function: u(x, y) = xy + x + y Suppose that now Reese loses almost his entire income, so that he is left with only one dollar, i.e. his new income is I0 = 1. If prices are still px = 2, py = 4, what is his new optimal consumption of x and y (Hint: Remember that consumption of both goods must be weakly positive, i.e. x∗ ≥ 0 and y∗ ≥ 0) (a) x∗ = 0.5, y∗ = 0(b) x∗ = 0.25, y∗ = 0(c) x∗ = 0.75, y∗ = 0.25(d) x∗ = 0.75, y∗ = 0(e) x∗ = 0.5, y∗ = 1
7.A college football coach says that given any two linemen A and B, he always prefers the one who is bigger and faster. Is this preference relation transitive? Is it complete? 8.Explain why convex preferences means that “averages are preferred to extremes. 9.If good 1 is a “neutral,” what is its marginal rate of substitution for good 2?
Reese thinks peanut butter and chocolate are great when separate, but when they combine they are even more epic. In other words, Reese likes to eat either peanut butter or chocolate, but when he eats them together, he gets additional satisfaction from the combination. His preference over peanut butter (x) and chocolate (y) is represented by the utility function: u(x, y) = xy + x + y Which of the following is NOT true about Reese’s preference? (a) The MRS decreases when x increases.(b) The preferences are homothetic.(c) The marginal utility of y is higher when x = 10 than when x = 5.(d) For any a > 0, Reese prefers the bundle (x =a/2 , y = a/2 ) over either the bundle (x = a, y = 0) or (x = 0, y = a).
Frank spends $75 on 10 magazines and 25 newspapers. The magazines cost $5 each and the newspapers cost $2.50 each. Suppose that his MU from the final magazine is 10 utils while his MU from the final newspaper is also 10 utils. According to the utility-maximizing rule, Frank should: a. Reallocate spending from magazines to newspapers. b. Reallocate spending from newspapers to magazines. c. Be satisfied because he is already maximizing his total utility. d. None of the above
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Consider a hypothetical consumer named Hayden who is shopping for bread and brie. The graph with bread and brie on the axes presents the utility‑maximizing combinations of bread and brie that Hayden chooses when the price of bread is $1.00$1.00 per loaf and the price of brie is $4.00$4.00 and $6.00$6.00 per wheel, respectively. The other graph shows Hayden's demand curve for brie. The two points and associated values in the graph for bread and brie combinations correspond to points A and B in the graph of the demand curve for brie. What are the specific prices and quantities of brie associated with points A and B on Hayden's demand curve? price of brie at point A: $$ quantity demanded at point A: price of brie at point B: $$ quantity demanded at point B:
Suppose that as a consumer you have $34 per month to spend for munchies, either on pizzas which cost $6 each or on twinkies which cost $4 each. Suppose further that your preferences are given by the following total utility table. 1 2 3 4 5 6 7 TU for Pizza 60 108 138 156 162 166 166 TU for twinkies 44 76 100 120 136 148 152 First, graph the budget constraint with pizzas on the horizontal axis and twinkies on the vertical axis. What are the intercepts and slope of the opportunity cost? Express the budget constraint as an algebraic equation for a line. Next, should you purchase a twinkie first or a pizza first to get the “biggest bang for the buck”? How can you tell? (Hint: use the utility maximizing rule.) What should you purchase? Next, use the utility maximizing rule to identify the consumer equilibrium, that is, what combination of twinkies and pizzas will…
John likes Coca-Cola. After consuming one Coke, John has a total utility of 10 utils. After two Cokes, he has a total utility of 25 utils. After three Cokes, he has a total utility of 50 utils. Does John show diminishing marginal utility for Coke, or does he show increasing marginal utility for Coke? Supposethat John has $3 in his pocket. If Cokes cost $1 each and John is willing to spend one of his dollars on purchasing a first can of Coke, would he spend his second dollar on a Coke, too? What about the third dollar? If John’s marginal utility for Coke keeps on increasing no matter how many Cokes he drinks, would it be fair to say that he is addicted to Coke?
Heather and Jeremiah both enjoy sunflower butter (s) and jelly (j) sandwiches, but they have varying preferences regarding the optimal ratio of the two. Heather prefers her sandwiches to have 6 spoonfuls of sunflower butter for every 3 scoops of jelly, whereas Jeremiah prefers 3 scoops of sunflower butter for every 5 scoops of jelly. They both would prefer as many sandwiches as possible, but derive no utility from sandwiches without their preferred ratio of s and j. A) Write down a utility function for both Heather and Jeremiah regarding consumption of s and j (U(s,j)) B) On the same graph, draw a set of indifference curves for both Heather and Jeremiah, labeling which is which. C) In addition to s and j, Heather and Jeremiah now need bread, b, to make sandwiches. Heather prefers to separate her sunflower butter and jelly and therefore uses 3 slices of bread per sandwich. Write down Heather’s utility function Uh(s,j,b) as a function of the three inputs.
Q.4. Example 1.D.1: Suppose that X = {x,y,z}, B = {{x,y}, {y,z},{x,z}}, C({x,y}_ = {x}, C({y,z}) = {y} and C({x,z})={z} This choice structure satisfies the weak axiom. Nevertheless, we cannot have rationalizing preferences. How do we know if this choice structure satisfies the weak axiom? Given the C({x,y}) = x, C({y,z}), shouldn't C({x,z}) = x? if we have to always make the same choice based on WARP.