The marginal utility of a good (e.g., bananas) declines with increases in the consumption of that good. This phenomenon is referred to as the

Which of the following is NOT an example of an opportunity cost?

A) By spending Thursday night studying for an economics exam, a student was unable to complete a homework assignment for calculus class. B) Because David used all of his vacation time to paint his house, he was unable to visit the Caribbean last year. C) Because Mary is now being paid a higher wage, she can afford to buy a new car even though she is moving into a bigger apartment. D) By choosing to attend college, Jean was not able to continue working as an electrician; as a result, she gave up more than $85,000 in earnings while she was in college.

A. Yahoo, Bing, and Google have roughly equal market shares. B. the Herfindahl index value is 10,000. C. Google holds about 70 percent of the market, while Bing and Yahoo together comprise about 28 percent. D. government subsidies ensure that

search engines are provided at no cost to all Internet users. A. Yahoo, Bing, and Google have roughly equal market shares. B. the Herfindahl index value is 10,000. C. Google holds about 70 percent of the market, while Bing and Yahoo together comprise about 28 percent. D. government subsidies ensure that search engines are provided at no cost to all Internet users.