Return on Capital for Four Different Sectors
Project One
Jibril Amiyr
ECON 3112
11/10/2012
Row 2
2) Summary
Based on the data given for four different sectors; Sales (in millions of dollars), Debt-toCapital ratio or D/C-Ratio (as a percentage), we want to
How Does Screen Size Affect Battery Life
Project 2
Jibril Amiyr
Econ 3112
11/17/12
2) Introduction
Based on the data given by three different factors; Screen size (in square inches),
Processor speed (in gigahertz), and Battery size (in milli-amp hours), w
Homework for Chapter 11 Quadratics and Log Form (and Dummies, Interactions)
(DUE IN CLASS or BEFORE, Wed. Nov 11)
PART 1: Use the following regression output to answer the questions.
1. Interpret the coefficient on assistant. (Ignore the interaction term
Homework for Chapter 9 Dummies and Interactions
DUE IN CLASS or BEFORE, Fri. Oct 23)
KEY
1.
Use the following information about the Box Office Model to answer the questions.
BOX OFFICE MODEL
boxoffice_mil = -3.044 + 1.088 (budget_mil) + 4.16 (female) 6.01
CHAPTER 1
Ch 11 Functional Form
Economics limps along with one foot in untested
hypotheses and
the other in untestable slogans.
Joan Robinson, Economist
Functional Form
A regression equation makes two
statements:
Economic
Statistical
In this chapter w
CHAPTER 1
Ch 9 Dummy Variables
and Interaction Terms
No one is entertained by economics.
Michael Moore, Filmmaker,
and every economics class ever.
Dummy Variables
aka: Classificatory
Binary Choice
Dichotomous
Qualitative
Categorical
There is an important
CHAPTER 1
Multicollinearity is not a statistical
flaw; it is a feature of the data that
tends to createjustified uncertainty.
Any good econometrician
Ch 12 Multicollinearity
Multicollinearity
Assume we are interested in the influence
of income and educat
(T/F) When we drop a variable from a model, the
total sum of squares (TSS) increases.
FALSE. The TSS is the variation of Y around its sample
average ~Y . It is unrelated to the
number of X's used to explain Y .
(T/F) If X and Y are independent, the condit
econometrics
quantitative measurement of actual economic and business
phenomena
uses of econometrics
description, hypothesis, forecast
stochastic error term
explains all changes in Y not explained by changes in Xs
residual (e)=
actual value - estimated va
Econometrics
Science and art of using economic theory and
statistical techniques to analyze economic data
Randomized Controlled Experiment
there is both a control group that receives no
treatment and a treatment group that does. The
treatment is assigned
Gen
generate new variable depending on null for F test, if null is
B1+B2=0, gen (x1-x2), because sub B1 with (C-B2)
test
command for join significance
estat ovtest
RESET test
tsset (var)
gives stats for variable
estat vif
multicollinearity
all parameters
ECON 3112
Fall 2016
Problem Set #2 Solutions
DUE before class starts (2pm) on Thursday, September 15.
NOTE: This homework must be typed and submitted in a single PDF file via Canvas. You are
required to include the log file for the Stata problems. See the
ECON 3112
Fall 2016
Problem Set #4
(25 points total)
DUE at the beginning of class (2pm) on Tuesday, October 25
For full credit on this homework, you must turn in:
1) Stata do-file (.do) (2.5 points) submit via Canvas
2) Stata log-file (.log) (2.5 points)
ECON 3112
Fall 2016
Problem Set #3 SOLUTIONS
DUE at the beginning of class (2pm) on Thursday, September 13.
No credit will be given for the Stata part of the homework unless you also turn on your log file
and do-file.
1. (1 point) If an independent variab
ECON 3112
Fall 2016
Problem Set #1
SOLUTIONS
1. (1 point) The notion of ceteris paribus means other factors being equal.
a. True
b. False
ANSWER: a
2. (1 point) Which of the following refers to panel data?
a. Data on the unemployment rate in a country ove
When Logs
Attack!
Types of Functions
Log-Linear
Linear-Log
Log-Log
Linear-Linear
Log-Linear
Brainssss
elp Mee
H
Ln(Wage) = 6.97 h
hghh
GH g
U rg
A
39 (Income)
ay safe
aw ew
Run Ph
Back to Types of Functions
Linear-Log
safe
Phew
(Wage) = 6.97- 39
UGainssss