Consider the following Von-Neumann-Morgenstern utility functions of two different decision takers (i) and (ii): (1) v, = a- be(-Ay) (ii) V = a+ bln(y) where a e R,b>0, A>0, y > 0.

Microeconomic Theory
12th Edition
ISBN:9781337517942
Author:NICHOLSON
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Chapter18: Asymmetric Information
Section: Chapter Questions
Problem 18.8P
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Consider the following Von-Neumann-Morgenstern utility functions of two different
decision takers (i) and (ii):
(i) v, = a- be(-Ay)
(ii) V# = a+bln(y)
where a e IR¸,b>0, A>0, y > 0.
(a) Calculate the Arrow-Pratt measures of absolute and relative risk aversion. Do (i) and
(ii) conform to the common assumptions of decreasing absolute risk aversion and
constant relative risk aversion?
(b) What are the assumptions of Pratt's theorem and what does it imply for two decision
takers such as (i) and (ii)? Compare the risk premia of the two decision takers for a
given risk level using Pratt's theorem.
(c) Assume an income of 50. For which values of A has decision taker (i) a higher
willingness to pay for a fair insurance than decision taker (ii).
Transcribed Image Text:Consider the following Von-Neumann-Morgenstern utility functions of two different decision takers (i) and (ii): (i) v, = a- be(-Ay) (ii) V# = a+bln(y) where a e IR¸,b>0, A>0, y > 0. (a) Calculate the Arrow-Pratt measures of absolute and relative risk aversion. Do (i) and (ii) conform to the common assumptions of decreasing absolute risk aversion and constant relative risk aversion? (b) What are the assumptions of Pratt's theorem and what does it imply for two decision takers such as (i) and (ii)? Compare the risk premia of the two decision takers for a given risk level using Pratt's theorem. (c) Assume an income of 50. For which values of A has decision taker (i) a higher willingness to pay for a fair insurance than decision taker (ii).
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