Economics (7th Edition) (What's New in Economics)
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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Chapter 11.A, Problem 10PA

Subpart (a):

To determine

Isoquant, Input price ratio and input combination.

Subpart (b):

To determine

Isoquant, Input price ratio and input combination.

Subpart (c):

To determine

Isoquant, Input price ratio and input combination.

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3. Consider the following estimated regression equation, estimated using a sample of firms, where RDis total firm spending on research and development in USD ($), Revenue is total firm revenuein USD ($), and W ages is the firms’ total spending on wages in USD ($) (standard errors inparentheses):RDd = 1000(600)+ 0.5(0.1)Revenue + 1.5(0.5)W ages,(a) Interpret the coefficients on each of the explanatory variables. (b) Which of the three coefficients are statistically significant at the 5% level of significance? Howdo you know? A researcher runs a two-sided statistical test of the null hypothesis that both the coefficients onthe explanatory variables above are jointly equal to 0.25 (mathematically, that β1 = β2 = 0.25),and reports a p-value of 0.045.(c) What does this p-value mean for the outcome of the test? (d) What would an appropriate two-sided alternative hypothesis look like?
4. Consider the following regression equation, where Google is equal to 1 if an individual in thesample has worked at Google and 0 otherwise, and Earnings is annual earnings in thousands ofpounds (standard errors in parentheses):Earnings \ = 25000(12.5)+ 42000(7.0)Google,(a) Interpret the coefficient on Google.(b) Is the coefficient on Google statistically significant at the 5% level? How do you know?(c) Suppose that instead of Google we had used a variable called NeverGoogle, equal to 1 if anindividual has never worked at Google and 0 otherwise. (i) How would the slope coefficientchange? (ii) What would happen to the intercept? (d) What prevents us from interpreting the coefficient on Google as a causal effect? Give examplesin your answer.
4. Examine the regression table below before answering the questions that follow.Throughout, the Log() function represents the natural logarithm, so that Log(e) =1:Dependent Variable: Log(Expenditures on Cigarettes + 1)Method: Least SquaresVariable Coefficient Std. ErrorConstant 0.50 0.41Log(Income+1) −0.02 0.002(a) Why are the dependent and explanatory variables in the form log(1+x), ratherthan log(x)? (b) Which of the above coefficients are statistically significant? How do you know?(c) Interpret the coefficient on Log(Income+1). (d) What is the predicted level of Log(Expenditures on Cigarettes + 1) for anobserved individual with income of e10 − 1? (4

Chapter 11 Solutions

Economics (7th Edition) (What's New in Economics)

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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