Principles of Macroeconomics 2e
2nd Edition
ISBN: 9781947172388
Author: Steven A. Greenlaw; David Shapiro
Publisher: OpenStax
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Textbook Question
Chapter 15, Problem 38P
Suppose the Fed conducts an open market purchase by buying
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Difference-in-Difference
In the beginning of 2001, North Dakota legalized fireworks. Suppose you are interested in
studying the effect of the legalizing of fireworks on the number of house fires in North
Dakota. Unlike North Dakota, South Dakota did not legalize fireworks and continued to ban
them. You decide to use a Difference-in-difference (DID) Model. The numbers of house fires
in each state at the end of 2000 and 2001 are as follows:
Number of house fires in Number of house fires in
Year
North Dakota
2000
2001
35
50
South Dakota
54
64
a. What is the change in the outcome for the treatment group between 2000 and 2001?
Show your working for full credit. (10 points)
b. Can we interpret the change in the outcome for the treatment group between 2000
and 2001 as the causal effect of legalizing fireworks on number of house fires?
Explain your answer. (10 points)
C.
Regression Discontinuity
Birth weight is used as a common sign for a newborn's health. In the United States, if a baby
has a birthweight below 1500 grams, the newborn is classified as having “very low birth
weight". Suppose you want to study the effect of having very low birth weight on the number
of hospital visits made before the baby's first birthday. You decide to use Regression
Discontinuity to answer this question. The graph below shows the RD model:
Number of hospital visits made before baby's first birthday
5
1400
1450
1500
1550
1600
Birthweight (in grams)
a. What is the running variable? (5 points)
b. What is the cutoff? (5 points)
T
What is the discontinuity in the graph and how do you interpret it? (10 points)
C.
Regression Discontinuity
Birth weight is used as a common sign for a newborn's health. In the United States, if a baby
has a birthweight below 1500 grams, the newborn is classified as having “very low birth
weight". Suppose you want to study the effect of having very low birth weight on the number
of hospital visits made before the baby's first birthday. You decide to use Regression
Discontinuity to answer this question. The graph below shows the RD model:
Number of hospital visits made before baby's first birthday
5
1400
1450
1500
1550
1600
Birthweight (in grams)
a. What is the running variable? (5 points)
b. What is the cutoff? (5 points)
T
What is the discontinuity in the graph and how do you interpret it? (10 points)
Chapter 15 Solutions
Principles of Macroeconomics 2e
Ch. 15 - Why is it important for the members of the Board...Ch. 15 - Given the danger of bank runs, why do banks not...Ch. 15 - Bank runs are often described as self-fulfilling...Ch. 15 - If the central bank sells 500 in bonds to a bank...Ch. 15 - What would be the effect of increasing the banks...Ch. 15 - Why does contractionary monetary policy cause...Ch. 15 - Why does expansionary monetary policy causes...Ch. 15 - Why might banks want to hold excess reserves in...Ch. 15 - Why might the velocity of money change...Ch. 15 - How is a central bank different from a typical...
Ch. 15 - List the three traditional tools that a central...Ch. 15 - How is bank regulation linked to the conduct of...Ch. 15 - What is a bank run?Ch. 15 - In a program of deposit insurance as it is...Ch. 15 - In government programs of bank supervision, what...Ch. 15 - What is the lender of last resort?Ch. 15 - Name and briefly describe the responsibilities of...Ch. 15 - Explain how to use an open market operation to...Ch. 15 - Explain how to use the reserve requirement to...Ch. 15 - Explain how to use the discount rate to expand the...Ch. 15 - How do the expansionary and contractionary...Ch. 15 - How do tight and loose monetary policy affect...Ch. 15 - How do expansionary, tight, contractionary, and...Ch. 15 - Which kind of monetary policy would you expect in...Ch. 15 - Explain how to use quantitative easing to...Ch. 15 - Which kind of monetary policy would you expect in...Ch. 15 - How might each of the following factors complicate...Ch. 15 - Define the velocity of the moneyCh. 15 - What is the basic quantity equation of money?Ch. 15 - How does a monetary policy of inflation target...Ch. 15 - Why do presidents typically reappoint Chairs of...Ch. 15 - In what ways might monetary policy be superior to...Ch. 15 - The term moral hazard describes increases in risky...Ch. 15 - Explain what would happen if banks were notified...Ch. 15 - A well-known economic model called the Phillips...Ch. 15 - How does rule-based monetary policy differ from...Ch. 15 - Is it preferable for central banks to primarily...Ch. 15 - Suppose the Fed conducts an open market purchase...Ch. 15 - Suppose the Fed conducts an open market sale by...Ch. 15 - All other things being equal, by how much will...Ch. 15 - Suppose now that economists expect the velocity of...Ch. 15 - If GDP is 1,500 and the money supply is 400, what...Ch. 15 - If GDP now rises to 1,600, but the money supply...Ch. 15 - If GDP now falls back to 1,500 and the money...
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