EC 501: Problem Set 2, Solutions
1. Suppose Jacks utility function is UJ (LJ , FJ ), where LJ is the amount of
lean and FJ is the amount of fat he consumes. Since he never
actually eats any fat, his utility function must be
UJ (LJ , FJ ) = LJ ,
or any pos

EC 501: Problem Set 3, Solutions
1. (a) To nd the compensated demand functions, we need to solve the
problem:
M inimize
E = pa A + pb B
1
1
A 2 B 2 = U.
subject to
The Lagrangian for this problem is
1
1
L = pa A + pb B + U A 2 B 2 .
The rst order conditio

EC 501: Problem Set 3
(Due in class on Tuesday, September 23)
1.
Adam's utility function is U = A1/2 B1/2 where A, B represent the number of apples and
bananas respectively that he consumes.
(a) Find Adams compensated demand functions.
(b) Write down Adam

EC 501: Problem Set 5
(Due in class on Tuesday, October 7)
1. Farmer Joe is an apple grower, whose only source of income is his apple crop of A0, which
he can sell at the going price of pa. His utility function depends on the quantities of the only
two go

EC 501: Final Exam (Fall 2015),
Solutions
1. (a) Since the utility function is Leontief, we can write down the demand
functions as
x=
2I
2px + 3py
and
y=
3I
.
2px + 3py
(b) Substituting the given data into the demand functions we get:
x0 = 14
and
y0 = 21.

EC507 A1: Statistics for Economists
Fall 2015
Problem Set 1
Due Friday, September 18
Late problem sets will not be accepted no exceptions. You may work together on the problem set, but
every student has to hand in his/her own answers. All questions count

EC 501: Problem Set 1
(Due in class on Thursday, September 10)
1.
(a) Find the relationship between the Centigrade (C) and Fahrenheit (F) temperature scales,
given that (i) the relationship is linear, (ii) water freezes at C = 0 or F = 32, and (iii) water

EC 501: Problem Set 8
(Due in class on Thursday, October 30)
1.
In the economy of Ricardia, two consumer goods, X and Y, are produced from a single
factor input, labor, according to the production functions:
Y = 3Ly
and
X = 3Lx
where Ly and Lx are the qua

EC 501: Problem Set 7
(Due in class on Tuesday, October 21)
1. Adam and Barbara both buy widgets. Their demand curves are respectively
p = 50 - 2 qa and p = 50 qb.
What is their combined demand curve for widgets?
2 There are 100 people in Slobovia whose i

EC 501: Problem Set 9
(Due in class on Tuesday, November 4)
1.
Liz Baylor has a $100,000 ring and keeps $100,000 cash in a checking account that pays no
interest. If the ring is stolen, Liz will be forced to replace it at a cost of $100,000. The chance of

EC 501: Problem Set 6
(Due in class on Thursday, October 16)
1.
The Widget Co. can produce widgets according to the formula:
q = 5K L
where q is the output of widgets, and K, L are the quantities of capital and labor used.
(a) Are there constant, increasi

EC 501
Final Exam
Dec 17, 2015
Answer all questions, showing all your work. Try to use diagrams wherever possible. Time
allowed: 2 hours. Each question is worth 20 points. Good luck!
1. John consumes only two goods, x and y, and his utility function is

1 Substitution Eect, Income Eect, Gien Goods
1
14.01 Principles of Microeconomics, Fall 2007
Chia-Hui Chen
September 19, 2007
Lecture 7
Substitution and Income Eect, Individual and
Market Demand, Consumer Surplus
Outline
1. Chap 4: Substitution Eect, Inc