Return on Capital for Four Different Sectors
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
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)
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
Ch 11 Functional Form
Economics limps along with one foot in untested
the other in untestable slogans.
Joan Robinson, Economist
A regression equation makes two
In this chapter w
Ch 9 Dummy Variables
and Interaction Terms
No one is entertained by economics.
Michael Moore, Filmmaker,
and every economics class ever.
There is an important
Multicollinearity is not a statistical
flaw; it is a feature of the data that
tends to createjustified uncertainty.
Any good econometrician
Ch 12 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
quantitative measurement of actual economic and business
uses of econometrics
description, hypothesis, forecast
stochastic error term
explains all changes in Y not explained by changes in Xs
actual value - estimated va
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
generate new variable depending on null for F test, if null is
B1+B2=0, gen (x1-x2), because sub B1 with (C-B2)
command for join significance
gives stats for variable
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
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)
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
1. (1 point) If an independent variab
Problem Set #1
1. (1 point) The notion of ceteris paribus means other factors being equal.
2. (1 point) Which of the following refers to panel data?
a. Data on the unemployment rate in a country ove
Types of Functions
Ln(Wage) = 6.97 h
Back to Types of Functions
(Wage) = 6.97- 39