Principles of Economics 2e
2nd Edition
ISBN: 9781947172364
Author: Steven A. Greenlaw; David Shapiro
Publisher: OpenStax
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Textbook Question
Chapter 5, Problem 32CTQ
Suppose you could buy shoes one at a time, miter than in pain. What do you predict the cross-
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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 5 Solutions
Principles of Economics 2e
Ch. 5 - From the data in Table 5.5 about demand for smart...Ch. 5 - From the data in Table 5.6 about supply of alarm...Ch. 5 - Why is the demand curve with constant unitary...Ch. 5 - Why is the supply curve with constant unitary...Ch. 5 - The federal 3mm decides to require that automobile...Ch. 5 - Suppose you are in change of sales at a...Ch. 5 - What would the gasoline price elasticity of supply...Ch. 5 - The avenge annual income rises from 25,000 to...Ch. 5 - Suppose the cross-price elasticity of apples with...Ch. 5 - What is the formula for calculating elasticity?
Ch. 5 - What is the price elasticity of demand? Can you...Ch. 5 - What is the price elasticity of supply? Can you...Ch. 5 - Describe the general appearance of a demand or a...Ch. 5 - Describe the general appearance of a demand or a...Ch. 5 - If demand is elastic, will shifts in supply have a...Ch. 5 - If demand is inelastic, will shifts in supply have...Ch. 5 - If supply is elastic, will shifts in demand have a...Ch. 5 - If supply is inelastic, will shifts in demand have...Ch. 5 - Would you usually expect elasticity of demand or...Ch. 5 - Under which circumstances does line tax burden...Ch. 5 - What is the formula for the income elasticity of...Ch. 5 - What is the formula for line cross-price...Ch. 5 - What is the formula for the wage elasticity of...Ch. 5 - What is the formula for elasticity of savings with...Ch. 5 - Transatlantic air travel in business class has an...Ch. 5 - What is the relationship between price elasticity...Ch. 5 - Can you think of an industry (or product) with...Ch. 5 - Would you expect supply to play a more significant...Ch. 5 - A city has build a bridge over a river and it...Ch. 5 - In a market where the supply curve is perfectly...Ch. 5 - Economists define normal goods as having a...Ch. 5 - Suppose you could buy shoes one at a time, miter...Ch. 5 - The equation for a demand curve is P=483Q. What is...Ch. 5 - The equation for a demand curve is P=2/Q. What is...Ch. 5 - The equation for a supply curve is 4P=Q. What is...Ch. 5 - The equation for a supply curve is P=3Q8. What is...Ch. 5 - The supply of paintings by Leonardo Da Vinci, who...Ch. 5 - Say that a certain stadium for professional...Ch. 5 - When someones kidneys fail, the person needs to...Ch. 5 - Assume that the supply of law-skilled worker is...
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