Suppose labor supply can be described as ES = 0.1w ? 1000 where w is yearly salary. How many workers are willing to work when the yearly salary is $20,000?

If the Herfindahl-Hirschman Index in the market for single-use cameras equals 10,000 , then the single-use camera industry is best characterized as

A) a monopoly. B) monopolistic competition. C) an oligopoly. D) perfect competition. E) either a monopoly or monopolistic competition.

If a shoe monopoly experiences an outward shift in its demand curve, the industry demand curve for shoes must have

a. shifted slightly less b. been flat to begin with c. shifted slightly more d. shifted more quickly e. made the exact same shift