Department of Economics
University of California
Economics 141: PROBLEM SET 1 (changes appear in RED)
Due: Tuesday, February 7, 2011, 11:00 AM (before lecture)
Spring 2012
Prof. Woroch
Instructions: Print the name and SID of each member of your study grou
SECTION 1: WHAT IS ECONOMETRICS?1
ECON 140: ECONOMIC STATISTICS AND ECONOMETRICS, 101 AND 104 DIS
HEDVIG HORVTH
Spring 2011
1. WHAT IS ECONOMETRICS?
the science and art of using economic theory and statistical techniques to analyze economic
data (SW p. 1)
Department of Economics
University of California
Spring 2012
Prof. Woroch
Economics 141: PROBLEM SET 1
Due: Tuesday, February 7, 2011, 11:00 AM (before lecture)
Instructions: Print the name and SID of each member of your study group (a maximum of three) a
Department of Economics
University of California
Spring 2012
Woroch/Horvath
Economics 141: PROBLEM SET 3
Due: Tuesday, March 13, 2012, 11:00 AM (before lecture)
Instructions: Print the name and SID of each member of your study group (a maximum of three) a
NAME_
Pd_
Chapter 4 TEST A
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. Which of the following could be factors that would contribute to the decline in amphibian populations?
a. habitat regeneration
b
NAME_
Pd_
APES Chapter 5 TEST A
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. Which of the following best categorizes the most common form of interspecific species interactions?
a. competition
b. mutua
110 AP Environmental Science
MULTIPLECHOICE QUESTIONS
1. The zone of the atmosphere in which weather occurs is known as the
(A) ionosphere
(B) mesosphere
(C) troposphere
(D) thermosphere
(E) stratosphere
2. 99% of the volume of gases in the lower a
NAME_ Pd
_
APES Chapter 1 TEST A
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. The longterm sustainability of life on planet Earth must depended on
a. solar energy
b. nutrient recycling
c. biodiversit
NAME_ Pd
_
Chapter 2 TEST A
Multiple Choice: Identify the choice that best completes the statement or answers the question.
_
1. Science
a. is a study of the history of the natural world
b. attempts to discover order in nature to interpret the past
c. is
Section 6  Econ 141
Spring 2012, GSI: Hedvig Horvth
1
Warmup: Bivariate Linear Regressions
1. SW 5.2 (e): Suppose that a researcher, using wage data on 250 randomly selected white workers and
280 black workers, estimates the OLS regression
W age = 12.52
NAME_ Pd
_
APES Chapter 3 TEST A
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. Tropical rain forests cover about 2% of the Earths land surface, and
a. contain about 2% of the Earths total biodiversity
NAME_ Pd _
APES Chapter 1 TEST A
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. The longterm sustainability of life on planet Earth must depended on
a. solar energy
b. nutrient recycling
c. biodiversit
Econ 141 Section 4
GSI: JiunHua Su
UC Berkeley
GSI: JiunHua Su (UC Berkeley)
Econ 141 Section 4
1 / 24
Outline
Bivariate Linear Regression Model (S&W Sec. 4.1)
Ordinary Least Squares (OLS) (S&W Sec. 4.2)
R2 (S&W Sec. 4.3)
Classical Linear Regression Mod
Problem Set #2
Economics 141
Spring 2015
Due September 29
Problems 1 through 7: Do Exercises 4.3, 4.5, 4.9, 5.2, 5.5, 5.8, and 17.2.of Stock & Watson text.
s
8.
Suppose you are given the following (semifabricated) data on a typical automobile fuel cons
s
About you:
Points:
Question 1
Question 2
Question 3
Total
Name:
Student ID#:
_
_
_
_
Econ 141, U.C. Berkeley, Spring 2014
Answers to Practice Midterm
Actual exam time 1 hour and 15 minutes
This midterm contains three questions for a total of 100 points. T
Problem Set #1
Economics 141
Spring 2015
Due September 15
1. through 8.: Do Exercises 2.9, 2.17, 2.19, 2.22, 2.24, 3.3, 3.13, and 3.16 from Stock & Watson text.
s
9.
Suppose X and Y are a pair of random variables with means
and correlation coe cient X;Y :
About you:
Name:
Points:
Question 1
Question 2
Question 3
Question 4
Total
Answer Key
Student ID#:
_
_
_
_
_
Econ 141, U.C. Berkeley, Spring 2014
Practice Final
Actual exam time 2 hours and 45 minutes
This practice final contains four questions for a tota
About you:
Points:
Question 1
Question 2
Question 3
Total
Name:
Student ID#:
_
_
_
_
Econ 141, U.C. Berkeley, Spring 2014
Answers to Midterm
March 5, 2014, 5.40pm6.55pm
This midterm contains three questions for a total of 100 points. The points for every
Econ 141 Section 2
GSI: JiunHua Su
UC Berkeley
GSI: JiunHua Su (UC Berkeley)
Econ 141 Section 2
1 / 15
Logistics
Problem set 1 is due on September 15th.
Problem sets are graded on a 3point scale:
Grade Performance
+ All problems are solved correctly

Econ 141, Fall 2015
Problem Set 1: Suggested Solutions
GSI: JiunHua Su
September 15, 2015
Q1 (S&W Exercise 2.9)
(a)
Table 1: Probability Distribution of Y
Outcome
Probability Distribution
14
0.21
22
0.23
30
0.30
40
0.15
65
0.11
E(Y ) = 14 0.21 + 22 0.23
Econ 141 Section 5
GSI: JiunHua Su
UC Berkeley
GSI: JiunHua Su (UC Berkeley)
Econ 141 Section 5
1 / 28
Outline
Classical Normal Regression Model
Condence Interval
Hypothesis Testing
NeoClassical Regression Model (S&W Sec. 17.1 and Sec. 17.4)
NeoClassi
About you:
Points:
Question 1
Question 2
Question 3
Question 4
Total
Name:
Student ID#:
_
_
_
_
_
Econ 141, U.C. Berkeley, Fall 2014
Final
Exam time 2 hours and 45 minutes
This final contains four questions for a total of 100 points. The points for every
Econ 141, U.C. Berkeley, Fall 2014
Problems S&W Chapter 5
These are the practice problems will help with your review of Probability and Statistics in Chapters 2 and 3. They
include several problems from the book as well as a sequence of problems specifica
Sample size
Sample size
a
b
c
d
e
a
b
c
d
e
f
g
a
b
c
d
e
f
g
h
NJ
Sample sizes from table 1
Wave 1
Wave 2
PA
331
399
1 Distribution of store types
Mean
0.411
std.dev.of mean 0.0270436
KFC
Mean
0.205
std.dev.of mean 0.0221894
Roy Rogers
Mean
0.248
std.dev
Chapter 6 Review Material Answers:
(Nonempirical) exercises:
6.2
(a) We dont know! We know that college graduates earn on $8.31/hour more on average than
people without a college degree. However, the latter subpopulation also includes people without
high
Econ 141, U.C. Berkeley, Fall 2014
Problems S&W Chapters 12 and 13
These are the practice problems related to Chapters 12 and 13. They include several problems from the book as
well as some problems based on theory discussed in class and a problem on John
Econ 141, U.C. Berkeley, Fall 2014
Problems S&W Chapters 8, 10, and 11
These are the practice problems related to Chapters 8, 10, and 11. They include several problems from the book
as well as a sequence of problems based on theory discussed in class.
Thi
Econ 141, U.C. Berkeley, Fall 2014
Problems S&W Chapters 4 and 18
These are the practice problems will help with your review of the matrix algebra in Chapter 18. It is a bridge
between the material in Chapter 4 and the matrix algebra results in Chapter 18
Econ 141, Fall 2016
Review Session II
GSI: JiunHua Su
Q1 (Wooldridge, exercise 4.8)
Consider the classical normal regression model with three independent variables:
Y = 0 + 1 X1 + 2 X2 + 3 X3 + u.
You would like to test the null hypothesis H0 : 1 32 = 1.
Econ 141 Section 6
GSI: JiunHua Su
UC Berkeley
GSI: JiunHua Su (UC Berkeley)
Econ 141 Section 6
1 / 21
Outline
Multiple Linear Regression Model (JMW Sec. 3.1)
Ordinary Least Squares
Matrix Representation (JMW Sec. 3.1 and Appendix E.1)
FrischWaugh The
Econ 141, Fall 2016
Review Session I
GSI: JiunHua Su
Q1 (Gujarati, exercise 3.9)
Consider the following formulations of the twovariable regression model:
Model I: Yi = 0 + 1 Xi + ui
+ ui
Model II: Yi = 0 + 1 (Xi X)
(a)
Find the estimators of 1 and 1 .
Econ 141, Fall 2015
Review Session II
GSI: JiunHua Su
November 3, 2015
sh is
ar stu
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vi y re
aC s
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rs e
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m
Q1 (Wooldridge, exercise 4.8)
Consider the classical normal regression model with three independent variables:
Y = 0 +
Econ 141 Section 7
GSI: JiunHua Su
UC Berkeley
GSI: JiunHua Su (UC Berkeley)
Econ 141 Section 7
1 / 23
Outline
Classical Normal Regression Model
(JMW Sec. 4.14.5 and Appendix E.3)
Confidence Set
Hypothesis Testing
Chow Test (JMW Sec. 7.4)
Asymptotic