Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #6
Children and their Parents Labor Supply
(Due: April 1)
Labor economists are interested in understanding the relationship between fertility and
labor supply (i.e. hours wo
Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #6 Solutions
Children and their Parents Labor Supply
(Due: April 1)
Labor economists are interested in understanding the relationship between fertility and
labor supply (i.e
Department of Economics
Harvard University
Economics 1123
Fall 2013
Problem Set #10
Political Distress, the Arab Spring and Financial Markets
(Due: Dec. 3)
On January 14th 2011 Tunisian protestors forced the Tunisian leader Ben Ali from
power. In this pro
Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #7
The Causal Effect of Class Size on Test Scores
(Due: April 8)
In this problem set you will explore use the determinants of test scores using the Project
Star data set use
Department of Economics
Harvard University
Economics 1123
Fall 2013
Problem Set #6 Solutions
Children and their Parents Labor Supply
(Due: October 31)
Labor economists are interested in understanding the relationship between fertility and
labor supply (i.
Department of Economics
Harvard University
Economics 1123
Fall 2013
Problem Set #2
An Empirical Investigation of Economic Growth
(Due: Sept. 19)
In this problem set you will explore the determinants of economic growth using a crosscountry data set. A tabl
Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #9
School Year, Student Performance and the Arab Spring (N.B. this problem set has 2 parts)
(Due: April 29)
Part 1: Effect of Length of School Year on Student Performance (u
Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #8 Solution
The Effect of Marriage on Earnings
(Due: April 15)
In many studies of the determinants of earnings, it has been found that married men earn
significantly more th
his model in Equation
at is, let
 f/nDni + Lilt.
sors and the con
ht express one of the
ear function of the
i
fcients of the regres
he internal validity of a
Ilysis in Section 10.6 and
f
: slope and intercept for
131117 + (xi + At + wiring
ii +7nDni+ui
Economics 15
Basic Econometrics
Professor Zabel
Fall 2010
Exam 1 Answer Key
1.(30) Students who apply to college typically need to take the SAT exam.
Exams are given in math and reading and scores on the exams range between
200 and 800. Suppose that you a
Exercises
135
one of the examination times based on the flip of a coin. Let j denote the
number of points scored on the exam by the i 1h student (0 :S j:; 100),
let( denote the amount of time that the student has to complete the exam
(( = 90 or 120), and
Economics 1123:
Lecture 14
()
Economics 1123:
1 / 20
Outline
Potential Outcomes
Experiments
QuasiExperiments
()
Economics 1123:
2 / 29
Potential Outcomes
Consider a treatment Di
Each individual has two outcomes Y
Yi (1) if Di = 1
Yi (0) if Di = 0
Each in
Economics 1123:
Lecture 7
()
Economics 1123:
1 / 28
Outline:
Nonlinear models I: polynomials, logarithms
()
Economics 1123:
2 / 28
Thinking beyond the line.
Up until now have concentrated on the specication
Yi = 0 + 1 Xi + ui
The world is obviously not a
Economics 1123:
Lecture 16
()
Economics 1123:
1 / 16
Outline
Heterogeneity II
IV and LATE
()
Economics 1123:
2 / 22
Instrumental Variables
From last lecture, we know what OLS estimates
when X is random and there is heterogeneity
What does IV estimate if w
Economics 1123:
Lecture 10
()
Economics 1123:
1 / 21
Outline:
Interpreting probit regression output
Interpreting logit regression output
Covariates and standard errors with binary
dependent variables
Measures of t
Theoretical aside: maximum likelihood and
Economics 1123:
Lecture 22
()
Economics 1123:
1 / 22
Outline
What are stochastic trends? More intuition
NonStationarity (II)
Breaks
An example
()
Economics 1123:
2 / 25
Stochastic Trends
What is a stochastic trend?
Graphically
()
Economics 1123:
3 / 25

Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #5
The Determinants of Married Womens Labor Force Participation in 1975
(Due: March 25)
What determines whether or not married women participate in the labor force (i.e. hol
Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #5
The Determinants of Married Womens Labor Force Participation in 1975
(Due: March 25)
What determines whether or not married women participate in the labor force (i.e. hol
Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #4
A Pirates Ransom for Me
(Due: March 4)
In this problem set you will explore the determinants of ransoms paid by the Spanish to
the Barbary Pirates in the 16th, 17th and 1
Econ 1123
Introduction to Econometrics
Spring 2015
Instructor: Eric Chaney, Littauer 231, email: [email protected]
Time and Location: MW, 1011:30, Harvard Hall 202.
Oce Hours: Th. 121, Littauer 231
Course Description
Economics 1123 introduces st
Department of Economics
Harvard University
Economics 1123
Fall 2015
Problem Set #4
A Pirates Ransom for Me
(Due: Mar. 4)
In this problem set you will explore the determinants of ransoms paid by the Spanish to
the Barbary Pirates in the 16th, 17th and 18th
Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #7
The Causal Effect of Class Size on Test Scores
(Due: April 8)
In this problem set you will explore use the determinants of test scores using the Project
Star data set use
Department of Economics
Harvard University
Economics 1123
Spring 2015
Problem Set #8
The Effect of Marriage on Earnings
(Due: April 15)
In many studies of the determinants of earnings, it has been found that married men earn
significantly more that single
Economics 1123:
Lecture 15
()
Economics 1123:
1 / 29
Outline
Heterogeneity I
Average Treatment Eects
()
Economics 1123:
2 / 16
Heterogeneity
Up until now we have largely assumed constant
eects across individuals
This is clearly not realistic
What happens
Economics 1123:
Lecture 11
()
Economics 1123:
1 / 28
Outline
The Midterm
Assessing Regression Studies (I)
()
Economics 1123:
2 / 28
Midterm
On Monday March 9th
Will start at 10:10 am and end at 11:30 am (80
minutes)
If your last name starts with the lette
Economics 1123:
Lecture 4
()
Economics 1123:
1 / 13
Outline
Regression when X is Binary
Homoskedasticity
Example
The theory of OLS (not on slides, so not on exam)
()
Economics 1123:
2 / 13
Regression when X is Binary
If the regressor X takes on two values
Economics 1123:
Lecture 18
()
Economics 1123:
1 / 24
Outline
Panel Data (II)
Examples
i. Airlines and Route Monopoly
ii. Tra c Deaths and Beer Taxes
()
Economics 1123:
2 / 12
Airlines
Does greater control of a route by an airline
increase prices?
Economic
Economics 20
Lecture #3: Bivariate Regression
1
The Simple Regression Model
yi = 0 + 1xi + ui
2
Simple Linear Regression Model
(SLRM)
yi = 0 + 1xi + ui
For situations where we believe there is a
linear (straight line) relationship between
two variables
h
Economics 20
Lecture #7: Multivariate
Regression Statistical
Inference Part I (ttests)
1
Outline
Last Time
Started talking sampling variability
Our estimates themselves are variable depend on
which data we get in our random sample
This time:
Hypothesis
Econometrics
Lecture #10
DifferenceinDifferences
1
Outline
Differenceindifferences: Mechanics,
and assumptions supporting causal
inference
Did the Mariel Boatlift lower the wages of
Miamis workers?
Briefly, time permitting:
Dummy Dependent Variable
2
Econometrics
Class #2: Rubin Causal Model
1
(from last time)
What is Causality?
What does it really mean that some treatment
has a causal effect on an outcome?
* key
example
today *
How would we ideally assess it?
Discussion examples:
Does getting a temp
Econometrics
Lecture #8: Ftests
1
Outline
Last Time
Confidence intervals
Hypothesis testing
Single coefficient (ttest)
This time:
Multiple coefficients (Ftest)
Also
How do we interpret polynomials in regression?
Multiple Linear Restrictions
Everything