Economics (7th Edition) (What's New in Economics)
7th Edition
ISBN: 9780134738321
Author: R. Glenn Hubbard, Anthony Patrick O'Brien
Publisher: PEARSON
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Question
Chapter 11, Problem 11.4.6PA
Subpart (a):
To determine
Relationship average total cost and marginal cost.
Subpart (b):
To determine
Relationship average total cost and marginal cost.
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Consider the following estimated regression equation, where both Rent and Earnings aremeasured in pounds (£) at the individual level (standard errors in parentheses):log(\Rent) = 6.9(0.69)+ 0.9(0.3)log(Earnings),(a) Interpret the coefficient on log(Earnings). (b) If we divided Earnings by 1000, so that it is measured in 1000s of pounds instead of pounds,how would (i) the slope, (ii) the intercept change in the above equation? Now suppose the variable London is added, which is equal to one if an individual iives inLondon, and zero otherwise. The estimated regression equation changes to:log(\Rent) = 6.22(0.622)+ 0.5(0.05)log(Earnings) + 2(0.5)London,(c) Interpret the coefficient on London. (d) Explain why the coefficient on log(Earnings) when London is included in the regression andthe coefficient on log(Earnings) when London is not included in the regression are not thesame.
3. Consider the following regression equation, where Cigs is daily spending on cigarettes in poundssterling (£), Y earsEduc is years of education, and F emale equals one if an individual is femaleand zero otherwise (standard errors in parentheses):Cigs [ = 4(1.6)− 0.08(0.032)Y earsEduc − 0.5(0.2)F emale,(a) Interpret the coefficients on Y earsEduc and F emale. (b) What does the model predict the average daily spending on cigarettes would be for womenwith 12 years of education? (c) Form the 95% confidence interval for the coefficient on F emale. (d) Economists are often interested in estimating production functions of the Cobb-Douglas form(Yiis the ith firm’s output, Liits spending on labour, and Kiits spending on capital):Yi = ALαi Kβi,How might someone estimate α and β from this equation using linear regression?
2. The demand and supply functions for two interdependent goods X and Y are givenbyQDX = 7 − 4PX + 2PYQSX = −6 + 4PX − PYQDY = 1 + PX − PYQSY = −4 − PX + 2PY(a) Find the market equilibrium condition for each good. (b) Express the equilibrium conditions in the matrix form Ax = b.(c) Find the inverse of matrix A. (d) Given your result in part (c), calculate the equilibrium prices. (e) What is the equilibrium quantity for goods X and Y ?
Chapter 11 Solutions
Economics (7th Edition) (What's New in Economics)
Ch. 11.A - Prob. 1RQCh. 11.A - Prob. 2RQCh. 11.A - Prob. 3RQCh. 11.A - Prob. 4PACh. 11.A - Prob. 5PACh. 11.A - Prob. 6PACh. 11.A - Prob. 7PACh. 11.A - Prob. 8PACh. 11.A - Prob. 9PACh. 11.A - Prob. 10PA
Ch. 11.A - Prob. 11PACh. 11.A - Prob. 12PACh. 11.A - Prob. 13PACh. 11.A - Prob. 14PACh. 11.A - Prob. 15PACh. 11 - Prob. 11.1.1RQCh. 11 - Prob. 11.1.2RQCh. 11 - Prob. 11.1.3PACh. 11 - Prob. 11.1.4PACh. 11 - Prob. 11.1.5PACh. 11 - Prob. 11.2.1RQCh. 11 - Prob. 11.2.2RQCh. 11 - Prob. 11.2.3RQCh. 11 - Prob. 11.2.4RQCh. 11 - Prob. 11.2.5PACh. 11 - Prob. 11.2.6PACh. 11 - Prob. 11.2.7PACh. 11 - Prob. 11.2.8PACh. 11 - Prob. 11.2.9PACh. 11 - Prob. 11.2.10PACh. 11 - Prob. 11.2.11PACh. 11 - Prob. 11.2.12PACh. 11 - Prob. 11.3.1RQCh. 11 - Prob. 11.3.2RQCh. 11 - Prob. 11.3.3PACh. 11 - Prob. 11.3.4PACh. 11 - Prob. 11.3.5PACh. 11 - Prob. 11.3.6PACh. 11 - Prob. 11.3.7PACh. 11 - Prob. 11.3.8PACh. 11 - Prob. 11.3.9PACh. 11 - Prob. 11.4.1RQCh. 11 - Prob. 11.4.2RQCh. 11 - Prob. 11.4.3RQCh. 11 - Prob. 11.4.4PACh. 11 - Prob. 11.4.5PACh. 11 - Prob. 11.4.6PACh. 11 - Prob. 11.4.7PACh. 11 - Prob. 11.4.8PACh. 11 - Prob. 11.4.9PACh. 11 - Prob. 11.4.10PACh. 11 - Prob. 11.5.1RQCh. 11 - Prob. 11.5.2RQCh. 11 - Prob. 11.5.3PACh. 11 - Prob. 11.5.4PACh. 11 - Prob. 11.5.5PACh. 11 - Prob. 11.5.6PACh. 11 - Prob. 11.5.7PACh. 11 - Prob. 11.5.8PACh. 11 - Prob. 11.5.9PACh. 11 - Prob. 11.6.1RQCh. 11 - Prob. 11.6.2RQCh. 11 - Prob. 11.6.3RQCh. 11 - Prob. 11.6.4RQCh. 11 - Prob. 11.6.5RQCh. 11 - Prob. 11.6.6PACh. 11 - Prob. 11.6.7PACh. 11 - Prob. 11.6.8PACh. 11 - Prob. 11.6.9PACh. 11 - Prob. 11.6.10PACh. 11 - Prob. 11.6.11PACh. 11 - Prob. 11.6.12PACh. 11 - Prob. 11.6.13PACh. 11 - Prob. 11.1CTECh. 11 - Prob. 11.2CTECh. 11 - Prob. 11.3CTECh. 11 - Prob. 11.4CTE
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