4. Mountain Dew, which (fun fact) was invented in east
Tennessee, is sold in 6 and 12-packs (a 6 pack contains 6 cans of
Mountain Dew in a single package, and a 12 pack contains 12 cans of
Mountain Dew in a single package). In this exercise we are going to
explore how the MRS for Mountain Dew and pretzels might be affected
by the units of measurement for Mountain Dew.
a. Suppose Mountain Dew is only sold in 6-packs. On a graph with
Mountain Dew on the horizontal axis (measured in number of 6-packs)
and pretzels (measured in pounds) on the vertical axis, draw three
indifference curves. Assume preferences for both goods are
rational, and satisfy the continuity, monotonicity, and convexity
assumptions.
b. Now suppose that Mountain Dew no longer offer 6-packs, and only
offers Mountain Dew in 12-packs. What happens to the MRS at each
consumption bundle in the graph from part (a) if 1 unit of Mountain
Dew now includes 12 cans of Mountain Dew instead of 6 cans.
c. In another graph, draw one of the indifference curves from part
(a). Pick a consumption bundle on that indifference curve and then
draw the indifference curve through that consumption bundle for an
indifference curve where Mountain Dew is measured in 12 packs. Does
the fact that these indifference curves cross imply that
preferences have changed?
d. Let x1=Mountain Dew and x2=pretzels. When x1 is measured in
units of 6-packs, preferences are captured by the utility function
U(x_1,x_2 )=x_1 x_2
What is the MRS of pretzels for beer?
e. What does the MRS have to be if x1 is measured in units of
12-packs?
f. Give a utility function that represents your preferences when x1
is measured in 12-packs. Make sure to check that the MRS matches
your answer in part (e)
g. Use this example to explain why it might be useful to compare
the substitutability between different goods using percentages
terms rather than relying on the MRS alone?
the price remain the same
4. Mountain Dew, which (fun fact) was invented in east Tennessee, is sold in 6 and...
4. Bert's preferences for Coke and Mountain Dew are described by the utility function U(C, M) 6C +2M (a) Find a formula for his indifference curves. Graph the indifference curves (b) What is Bert's marginal utility of Coke? (c) What is Bert's marginal utility of Mountain Dew? (d) What is Bert's MRS for Coke with Mountain Dew?
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