There are two periods 1 and 2. The riskless rate is zero. A risky asset pays...
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There are two periods 1 and 2. The riskless rate is zero. A risky asset pays dividend D in period 2 and trades at price S in period 1. The dividend D is normal with mean D and variance ². The supply of the risky asset is + u where > 0 and u is normal with mean zero and variance. There are N agents, each with negative exponential utility and CARA a. Agent i receives a signal s; about D. The signal s is s₁ = D +6₁, where e, is normal with mean zero and variance o2. The e; 's are independent across agents. We want to determine an REE in which the price has the form S = A +B N i=1 1-ca) ₁ (si - D) N for some constants A, B, and C. 1. (15 points) Explain why observing the price S is equivalent to observing (1-D) Cu. Denote the conditional mean of D given s, and by E (DS₁,E) = D + B. (si - D) + BeE and the conditional variance by σ (D | si, E)². Determine 3s, Be, and o (D| si, c)². 2. (10 points) Determine the demand zi of agent i. 3. (15 points) Write the market-clearing condition and determine three equations for A, B, and C. 4. (10 points) Determine an equation that involves only C, and that is analogous to the equation C = of the Grossman-Stiglitz (GS) model. 5. (10 points) Show that this equation is a cubic equation in C and that it has a unique positive root. 902 Ni 6. (10 points) How does C depend on o2? Give the intuition for this result and compare to the GS model. 7. (10 points) How does C depend on o2? Give the intuition for this result and compare to the GS model. Give the intuition for this result. 8. (10 points) Suppose that o goes to 0. What is the limit of C? What is the limit of T, the informativeness of prices, which is defined by T = 1 o(DS)² 9. (10 points) Show that, in general, demand is decreasing in price, but that, as o goes to 0, demand becomes independent of price. There are two periods 1 and 2. The riskless rate is zero. A risky asset pays dividend D in period 2 and trades at price S in period 1. The dividend D is normal with mean D and variance ². The supply of the risky asset is + u where > 0 and u is normal with mean zero and variance. There are N agents, each with negative exponential utility and CARA a. Agent i receives a signal s; about D. The signal s is s₁ = D +6₁, where e, is normal with mean zero and variance o2. The e; 's are independent across agents. We want to determine an REE in which the price has the form S = A +B N i=1 1-ca) ₁ (si - D) N for some constants A, B, and C. 1. (15 points) Explain why observing the price S is equivalent to observing (1-D) Cu. Denote the conditional mean of D given s, and by E (DS₁,E) = D + B. (si - D) + BeE and the conditional variance by σ (D | si, E)². Determine 3s, Be, and o (D| si, c)². 2. (10 points) Determine the demand zi of agent i. 3. (15 points) Write the market-clearing condition and determine three equations for A, B, and C. 4. (10 points) Determine an equation that involves only C, and that is analogous to the equation C = of the Grossman-Stiglitz (GS) model. 5. (10 points) Show that this equation is a cubic equation in C and that it has a unique positive root. 902 Ni 6. (10 points) How does C depend on o2? Give the intuition for this result and compare to the GS model. 7. (10 points) How does C depend on o2? Give the intuition for this result and compare to the GS model. Give the intuition for this result. 8. (10 points) Suppose that o goes to 0. What is the limit of C? What is the limit of T, the informativeness of prices, which is defined by T = 1 o(DS)² 9. (10 points) Show that, in general, demand is decreasing in price, but that, as o goes to 0, demand becomes independent of price.
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ANSWER Question 1 Observing the price S is equivalent to observing xiequivfracsumi1NsioverlineDNCu because the price S is a function of the signals sigmai and the noise u Specifically the price S is g... View the full answer
Related Book For
Industrial Organization Markets and Strategies
ISBN: 978-1107069978
2nd edition
Authors: Paul Belleflamme, Martin Peitz
Posted Date:
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