Macroeconomics
13th Edition
ISBN: 9781337617390
Author: Roger A. Arnold
Publisher: Cengage Learning
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Question
Chapter A, Problem 3QP
To determine
Plot the given data.
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here is a negative relationship between two variables if:
they move in opposite directions.
they move in the same direction.
one variable changes and the other does not.
neither variable moves.
Consider the following summary statistics of the variables x, y and z
var(x) = 2.4, var(y)=3.2, var(z) =1.1
cov(x,y) = 3.1, cov(x,z) = 4.2, cov(y,z) = 8
What is the instrumental variable (IV) estimator of the effect of x on y when you use the variable z as an instrumental variable?
In economics, what does the term ceteris paribus mean when analyzing the relationship between two variables? A. All other things being equal or held constant B. The direct relationship between two variables C. The inverse relationship between two variables D. The absence of any relationship between two variables
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Which of the following pairs is most likely to exhibit an inverse relationship?a. The amount of time you study and your grade point averageb. People’s annual income and their expenditure on personal computersc. Baseball players’ salaries and their batting averagesd. The price of a concert and the number of tickets that people purchase
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