Questions from General Economics

Q: For the population of firms in the chemical industry, let rd

For the population of firms in the chemical industry, let rd denote annual expenditures on research and development, and let sales denote annual sales (both are in millions of dollars). a. Write down...

Q: We used the data in MEAP93 for Example 2.12.

We used the data in MEAP93 for Example 2.12. Now we want to explore the relationship between the math pass rate (math10) and spending per student (expend). a. Do you think each additional dollar spen...

Q: Use the data in CHARITY [obtained from Franses and Paap (

Use the data in CHARITY [obtained from Franses and Paap (2001)] to answer the following questions: a. What is the average gift in the sample of 4,268 people (in Dutch guilders)? What percentage of pe...

Q: To complete this exercise, you need a software package that allows

To complete this exercise, you need a software package that allows you to generate data from the uniform and normal distributions. a. Start by generating 500 observations on xi—the...

Q: Use the data in COUNTYMURDERS to answer this questions. Use only

Use the data in COUNTYMURDERS to answer this questions. Use only the data for 1996. a. How many counties had zero murders in 1996? How many counties had at least one execution? What is the largest num...

Q: The data set in CATHOLIC includes test score information on over 7

The data set in CATHOLIC includes test score information on over 7,000 students in the United States who were in eighth grade in 1988. The variables math12 and read12 are scores on twelfth grade stand...

Q: Let kids denote the number of children ever born to a woman

Let kids denote the number of children ever born to a woman, and let educ denote years of education for the woman. A simple model relating fertility to years of education is kids = 0+ 1 educ + , w...

Q: In the simple linear regression model y = (0 + (

In the simple linear regression model y = (0 + (1x + u, suppose that E(u) =! 0. Letting (0 = E(u), show that the model can always be rewritten with the same slope, but a new intercept and error, where...

Q: The following table contains the ACT scores and the GPA (grade

The following table contains the ACT scores and the GPA (grade point average) for eight college students. Grade point average is based on a four-point scale and has been rounded to one digit after the...

Q: The data set BWGHT contains data on births to women in the

The data set BWGHT contains data on births to women in the United States. Two variables of interest are the dependent variable, infant birth weight in ounces (bwght), and an explanatory variable, aver...