Principles of Economics 2e
2nd Edition
ISBN: 9781947172364
Author: Steven A. Greenlaw; David Shapiro
Publisher: OpenStax
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Textbook Question
Chapter D, Problem 16RQ
Exercise D16
Why are savings, taxes, and imports referred to as “leakages” in calculating the multiplier effect?
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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?
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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)
Chapter D Solutions
Principles of Economics 2e
Ch. D - Exercise D6 What is on the axes of an...Ch. D - Exercise D7 What does the 45-degree line show?Ch. D - Exercise D8 What determines the slope of a...Ch. D - Exercise D9 What is the marginal propensity to...Ch. D - Exercise D10 Why are the investment function, the...Ch. D - Exercise D11 Why does the import function slope...Ch. D - Exercise D12 What are the components on which the...Ch. D - Exercise D13 Is the equilibrium in a Keynesian...Ch. D - Exercise D14 What is an inflationary gap? A...Ch. D - Exercise D15 What is the multiplier effect?
Ch. D - Exercise D16 Why are savings, taxes, and imports...Ch. D - Exercise D17 Will an economy with a high...Ch. D - Exercise D18 How do economists use the multiplier?Ch. D - Exercise D19 What does it mean when the aggregate...Ch. D - Exercise D20 Which model, the AD/AS or the AE...Ch. D - Exercise D21 What are some reasons that the...Ch. D - Exercise D22 What should the government do to...Ch. D - Exercise D23 Two counties are in a recession....Ch. D - Exercise D24 Compare two policies: a tax cut on...Ch. D - Exercise D25 What role does government play in...Ch. D - Exercise D26 If there is a recessionary gap of 100...Ch. D - Exercise D27 What other changes in the economy can...
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