A problem of interest to health officials (and others) is to determine the effects of smoking
during pregnancy on infant health. One measure of infant health is birth weight; a birth rate
that is too low can put an infant at risk for contracting various illnesses. Since factors other
than cigarette smoking that affect birth weight are likely to be correlated with smoking, we
should take those factors into account. For example, higher income generally results in access
to better prenatal care, as well as better nutrition for the mother. An equation that recognizes
this is:
bwght = β0 + β1 · cigs + β2 · f aminc + u
with bwght birth weight, ounces; cigs cigs smoked per day while pregnant; faminc 1988
family income, $ 1000s
(a) What are the most likely signs for β1 and β2?
(b) Do you think cigs and faminc are likely to be correlated? Explain why the correlation
might be positive or negative.
(c) Now estimate the equation with and without faminc, using the data in "pc2 01.xls".
Report the results in equation form, including the sample size and R2. Discuss your results, focusing on whether adding faminc substantially changes the estimated effect of cigs on bwght.

Cooper sues company a in state court in south carolina, where he lives, for negligence alleging personal injury and property damage of $100,000 after a truck driven by an employee of company a rear-ended his pickup truck. company a is incorporated in delaware, has its headquarters in new york, but does a substantial amount of business in south carolina. claiming diversity of citizenship, company a seeks removal to federal district court, but cooper opposes the motion. which of the following is true regarding whether the case may be properly removed to federal district court? the amount in controversy satisfies diversity requirements; and if company a's nerve center is in a state other than south carolina, then the case may be properly removed to federal court.the amount in controversy satisfies diversity requirements; and because company a is incorporated and has its headquarters in a state other than south carolina, the case may be properly removed to federal court.because the amount in controversy satisfies diversity requirements and company a is incorporated in a state other than south carolina, the case may be properly removed to federal court regardless of where company a's headquarters, nerve center, or principal place of business is located.because the amount in controversy satisfies diversity requirements and company a is headquartered in a state other than south carolina, the case may be properly removed to federal court regardless of where company a is incorporated and regardless of the location of its nerve center.because the amount in controversy fails to satisfy jurisdictional requirements, regardless of the location of company a, the case may not be removed to federal court.

Label each of the following statements true, false, or uncertain. explain your choice carefully. a. workers benefit equally from the process of creative destruction. b. in the past two decades, the real wages of low-skill u.s. workers have declined relative to the real wages of high-skill workers. c. technological progress leads to a decrease in employment if, and only if, the increase in output is smaller than the increase in productivity. d. the apparent decrease in the natural rate of unemployment in the united states in the second-half of the 1990s can be explained by the fact that productivity growth was unexpectedly high during that period.

1. which of the following is true about how your skill set relates to a future career? (1 point) employers like to hire people with only full-time job experience. employers consider subject-specific skills for new positions. skills learned in high school should not be included. skills from part-time jobs and volunteer work may prove beneficial in future jobs. 2. which of the following is a list of broad categories of skills? (1 point) creativity, art and communications, tools and trade, literacy and language, and interpersonal skills english and literacy, tools and trade, mathematics, and creativity interpersonal skills, intrapersonal skills, writing and literacy, tools and trade, and creativity mathematics and data, words and literacy, tools and tasks, interpersonal relationships, and creativity