Find the combination of X and Y that maximizes utility.
Calculate Consumers’ surplus of X, CSx = TUx – TEx, total
utility minus total expenditures such that total expenditures TEx =
Px.X. Do the same for commodity Y. Calculate consumers’ surplus CSy
= TUy – TEy, where total expenditures TEy = Py.Y.
Suppose Py rises to Py’ = $40. Find the combination of X and Y
that maximizes utility.
Calculate CSy’ the new consumers’ surplus of Y, CSy’ = TUy’ –
TEy’.
Draw the demand curve for commodity Y. Is it downward
sloping?
Challenging question: Find the equation for demand pertaining
to commodity Y such that Py = a – bY. In other words, find the
parameters a and b.
Solutions
Expert Solution
Answer: For the complete solution to this problem, refer to the
images below:
10) If MUx/Px < MUy/Py,
then
A) spending a dollar less on Y and a dollar more on X increases
utility.
B) spending a dollar less on X and a dollar more on Y
increases utility.
C) X is more expensive than Y.
D) Y is more expensive than X.
11) Ellie is spending her entire income on goods X and Y. Her
marginal utility from the last unit of X is 100 and the marginal
utility from the last...
For each of the formulas below, state whether it is true or
false.
a) pX,Y,Z(x,y,z)=pY(y)pZ∣Y(z∣y)pX∣Y,Z(x∣y,z)
Select an option
True
False
b) pX,Y∣Z(x,y∣z)=pX(x)pY∣Z(y∣z)
Select an option
True
False
c) pX,Y∣Z(x,y∣z)=pX∣Z(x∣z)pY∣X,Z(y∣x,z)
Select an option
True
False
d) ∑xpX,Y∣Z(x,y∣z)=1
Select an option
True
False
e) ∑x∑ypX,Y∣Z(x,y∣z)=1
Select an option
True ...
Suppose a consumer has preferences given by U(X,Y) = MIN[2X,Y].
Suppose PX = 1 and PY = 2. Draw the Income Consumption Curve for
this consumer for income values
• M = 100
• M = 200
• M = 300
To do this, carefully draw the budget constraints associated
with each of the prices for good X, and indicate the bundle that
the consumer chooses in each case. Also, be sure to label your
graph accurately.
5. What would be
the marginal utility of x (MUx) and the marginal utility
of y (MUy) if the utility
function is expressed by?
U = 5 x0.35 y0.65
Also, calculate the numerical values of those marginal utilities,
and the MRS when:
x = 10, and y=40
6. As a student,
David’s lunch has always been bagel and cream cheese. He rarely
could afford
to buy a decent meal. Now that he graduated and got...
Proposal X Proposal Y
Required
investment
$2,400,000 $3,000,000
Estimated
life
10
years
10 years
Estimated residual
value
$200,000
$200,000
Estimated annual net cash
flows
$450,000
$580,000
Required rate of
return
14%
14%
Which proposal is the better investment.
a. The demand for good x is given by x∗ = 60−4Px +2M +Py, where
Px is the price of good x, Py is the price of good y, and M is
income. Find the own-price elasticity of demand for good x when Px
=20,Py =20, and M =100. Is x an ordinary or giffen good?
Explain.
b. The demand for good x is given by x∗ = 60−4Px +2M +Py, where
Px is the price of good x, Py...
Consider a quasi-linear utility function, U(X, Y) = X1/2 + Y,
with some Px and Py
a. For an interior solution, solve step-by-step for the demand
functions of X* and Y*.
b. Under what circumstance would the optimal consumption involve
a corner solution for the utility maximization problem?
c. (Now, let Py = $1, I = 24, and suppose that Px increases from
$0.5 to $2. Find the Compensating Variation (CV) and the
Equivalence Variation (EV). In this example, how...
1. Consider the preferences of an individual over two goods, x
and y, with prices px and py and income
I.
(a) If the individual's preferences can be represented by the
utility function u(x,y) =2x1/2 + y, what is the
marginal rate of substitution? What does this MRS imply about how
this consumer would trade y for x? Are the underlying preferences
homothetic (explain)? Graphically illustrate a typical indifference
curve and explain how you know the shape.
(b) If the...
Let assume that a consumer has a
utility function u(x, y) = xy, and px = 1 dollar, py = 2 dollars
and budget=50. Derive the followings. (3 points each)
1) Marshallian demands of x and y
2) Hicksian demands of x and y
3) Indirect utility function
4) Expenditure function
5) Engel curve