Edward Wan (A45754380)
Homework 6. Due at 9:00 PM EDT, Tuesday, August 18.
Each question is worth 3 points, for a total value of 45 points
1. Suppose you are interested in using time series data to estimate the
following population model:
yt = 0 + 1xt + 2
Edward wan (A45754380)
Homework 1: Due by 9:00 PM EDT, Tuesday, July 14th
(This assignment is worth 45 points total. Each part (for example, 1 b. or 3 a.) is worth 3 points)
1. You work for a company that has developed a computer-based individual tutoring
Siyu Chen
EC 420 Problem Set 2
Professor: Woodbury
1.
. gen lwage=log(wage)
. tab black, sum(lwage)
Summary of lwage
Mean
Std. Dev.
=1 if black
Freq.
0
1
6.8164865
6.5244342
.41214464
.39392362
815
120
Total
6.7790038
.4211439
935
. sum lwage if black =1,
Edward Wan (A45754380)
Homework 2: Due 9:00 PM EDT, Tuesday, July 21th
This assignment is worth 45 points total. Each part of each question is worth 3 points.
1. True, False, Explain (Say whether each statement answer is true or false, then explain why.
Y
EC 420, Spring 2016
Problem Set 1
Due Thursday, January 28th in class
NOTE: For questions using Stata, please type your answers into a word processing document
(using MS Word or something similar). Insert the relevant part of your Stata log file into your
EC420 (Fall 2011)
Homework 7.
Due November 30, 2011
1. [40 pts] The 2004 Economic Report of the President has data on interest rates and annual inflation rates for the years 1948-2003. The variable i3t is the three-month T-bill rate for year t, inft is th
Economics 480 - Analysis of Labor Markets Review Questions for the Final Exam Professor Woodbury Fall 2011 Labor Supply 1. a. Bertram is a saltmine worker who earns a wage of $10 an hour. He can work for as many or as few hours as he likes at $10 an hour,
EC 420 (Fall 2011)
Homework 6.
Due November 16, 2011
1. [40 pts] Provide a short answer to each of the following questions. If you don't explain your answers, you will get NO credit: (a) Suppose that I want to explain the score on a standardized test, sco
5. Time Series Analysis
1. Nature of time series data (10)
2. Examples of TS regression models (10)
3. Finite sample properties (10)
4. Trends and seasonality (10)
5. The best of the rest (11-12)
EC420-6-p1
A1. The nature of TS data
Three major types of
NAME:
Economics 420
Professor Woodbury
Fall Semester 2015
Quiz #9
Instructions: Write your name legibly in the
space provided above. Be sure to code your PID
correctly on the scantron. Turn in this quiz with your
scantron any scantron that cannot be match
NAME:
Economics 420
Professor Woodbury
Fall Semester 2015
Quiz #10
Instructions: Write your name legibly in the
space provided above. Be sure to code your PID
correctly on the scantron. Turn in this quiz with your
scantron any scantron that cannot be matc
3. Simple regression (2)
A. Introduction and basics (2.1)
B. Estimators for regression parameters (2.2)
C. Algebraic properties of OLS (2.3-2.4)
D. Statistical properties of OLS (2.5)
EC420-3-p1
A. Introduction and Basics
1. Examples
2. Definitions
3. Int
6. Instrumental Variables
Instrumental Variables (IV) estimation is used
when your model has Cov(x,u) 0, and you
cannot come up with a way to make Cov(x,u) =
0.
Thus, IV can be used to address the problem
of omitted variables bias or of reverse
causalit
NAME:
Economics 420
Professor Woodbury
Fall Semester 2015
Quiz #12
Instructions: Write your name legibly in the
space provided above. Be sure to code your PID
correctly on the scantron. Turn in this quiz with your
scantron any scantron that cannot be matc
NAME:
Economics 420
Professor Woodbury
Fall Semester 2015
Quiz #11
Instructions: Write your name legibly in the
space provided above. Be sure to code your PID
correctly on the scantron. Turn in this quiz with your
scantron any scantron that cannot be matc
EC 420, Spring 2016
Problem Set 6
Due Thursday, April 21rd in class
NOTE: For questions using Stata, please type your answers into a word processing document
(using MS Word or something similar). Insert the relevant part of your Stata log file into your
d
4. Multiple Regression
A. Algebra/estimation (3)
B. Inference (4)
C. Functional form (2.4, 6.2, 7)
EC420-4-p1
A. Algebra/estimation (3)
1. Motivation
2. Mechanics (3.2)
3. The expected value of OLS coefficients (3.3)
4. Variable selection (3.3)
5. The var
NAME: Explained Answers
Economics 420 (section 2)
Professor Woodbury
Fall Semester 2015
Quiz #7
1. Consider a linear model with two independent
variables:
Y = 0 + 1X1 + 2X2 + u
Which of the following statements about the OLS
estimator of this model is fal
NAME: Explained Answers
Economics 420 (section 2)
Professor Woodbury
Fall Semester 2015
Quiz #6
Instructions: Write your name legibly in the
space provided above. Be sure to code your PID
correctly on the scantron. Turn in this quiz with your
scantron any
NAME:
Economics 420 (section 2)
Professor Woodbury
Fall Semester 2015
Quiz #8
Instructions: Write your name legibly in the
space provided above. Be sure to code your PID
correctly on the scantron. Turn in this quiz with your
scantron any scantron that can
Economics 420
Introduction to Econometrics
Professor Woodbury
Fall Semester 2015
Linear Regression with Multiple Independent
Variables
0. Summary and assessment of simple regression
1. Omitted variable bias
2. The multiple regression model
3. OLS estimati
Economics 420
Introduction to Econometrics
Professor Woodbury
Fall Semester 2015
Multiple Regression (continued)
3. OLS estimation of the multiple regression model
4. Measures of t in multiple regression
5. Assumptions in multiple regression
6. Distributi
Economics 420
Introduction to Econometrics
Professor Woodbury
Fall Semester 2015
Multiple Regression (concluded)
7. Hypothesis tests for a single parameter (for example, H0: j = 0)
8. Condence intervals (again)
9. F-tests for multiple linear restrictions
Economics 420
Introduction to Econometrics
Professor Woodbury
Fall Semester 2015
Model Specication
0. General comments on model specication
1. Scaling data
2. Review of the log transformation
3. Models with quadratics
4. More on dummy variables
more to co
On-the-Job Search and Wage Dispersion:
New Evidence from Time Use Data1
Andreas Mueller2
First Draft: May 15, 2009
This Draft: June 4, 2009
Abstract
This paper provides new evidence on time devoted to job search by the employed in the
U.S. I find that sea
NAME:
PID:
Economics 420 (section 2)
Professor Woodbury
Fall Semester 2015
Midterm Exam
Instructions:
1. Write your name and PID number legibly in the spaces provided above.
2. Check and double-check the coding of your PID number on your scantron. If you
Economics 420 (sections 2 and 3)
Professor Woodbury
Fall Semester 2015
Problem Set #3 with Solutions
Directions: Following each question, please handwrite or type your answers and copy/paste the
Stata output (use the copy as picture option). Staple all pa
Economics 420
Professor Woodbury
Fall Semester 2015
Advice on the Final Exam
1. The nal exam will have a format similar to the midterm, but will be somewhat longer because you
will have 120 minute rather than only 80 minutes. It will be comprehensive (inc
NAME:
Economics 420 (section 2)
Professor Woodbury
Fall Semester 2015
Quiz #2
Instructions: Write your name legibly in the space
provided above. Be sure to code your PID correctly
on the scantron. Turn in this quiz with your scantron
any scantron that can
NAME:
Economics 420 (section 2)
Professor Woodbury
Fall Semester 2015
Quiz #3
Instructions: Write your name legibly in the space
provided above. Be sure to code your PID correctly
on the scantron. Turn in this quiz with your scantron
any scantron that can
NAME:
PID:
Economics 420 (section 3)
Professor Woodbury
Fall Semester 2016
Midterm Exam (WITH ANSWERS)
Instructions:
1. Print your name and PID number legibly in the spaces provided above. Double-check the coding of your PID
number on your scantron. If yo
NAME:
Economics 420 (section 3)
Professor Woodbury
Fall Semester 2016
Quiz #7
Instructions: Write your name legibly in the space
provided above. Be sure to code your PID correctly on
the scantron. Turn in this quiz with your scantron
any scantron that ca
NAME:
Economics 420 (section 3)
Professor Woodbury
Fall Semester 2016
Quiz #8
Instructions: Write your name legibly in the
space above. Be sure to code your PID correctly on
the scantron. Turn in this quiz with your scantron
any scantron that cannot be m
Economics 420
Professor Woodbury
Fall Semester 2016
Advice on the Midterm Exam
1. The midterm will include approximately 2030 multiple choice questions (counting 40-60 percent of the total
score) and 24 short answer questions (40-60 percent).
2. The quiz
a. Price
tree
Marginal cost of cutting trees additional
Total
Canadian from US firm
Total revenue from
US firm
Average
Revenue
Marginal Revenue
b.
Marginal cost
Price
US firm
Total Revenue
Canadian firm
Marginal Revenue
Average Revenue
c.) The consumers i