The is equal to the sum of the squares of the market shares of all the firms in an industry. a. market concentration ratio b. Herfindahl-Hirschman index c. correlation coefficient d. standard deviation of concentration e. none of the above

Which of the following represents an unlimited queue? a. toll booth serving automobiles on the interstateb. drive through lane at a fast food restaurantc. faculty office with limited seating during office hoursd. restaurant with no outside seating and limited capacity due to fire departments restrictionse. small barbershop with only 5 chairs for waiting customers