If there are four firms in an industry with market shares of 50 percent, 40 percent, 5 percent, and 5 percent, the Herfindahl-Hirschman Index is

Suppose you are accepted to all of the three business schools to which you applied. Consider all the factors that could matter when it comes to choosing a business school

a. How would you go about making an optimal decision about which school to attend? b. Suppose you have to give up a job that pays you $40,000 a year to attend business school. How would this affect your calculations of which business school to attend?

Under a progressive tax system, the marginal tax rate could be equal to the average tax rate only when a taxpayer

a. has a very high income. b. has a very low income. c. is self-employed. d. invests in a retirement plan.