An auction market:

Implicit changes of requirements are permitted during:

A) Database deployment B) Logical modeling C) Database use D) Implicit changes of requirements are not permitted

Which of the following differentiates oligopoly from perfect competition?

A) In an oligopoly, firms have the ability to differentiate their products from competitors, while in perfect competition, firms remain in a high rivalry where the actions of one firm affect the other B) In an oligopoly, there are relatively few companies that dominate the market; while in perfect competition, many similar firms compete in the market. C) In perfect competition, customers have few viable substitutes available; while in an oligopoly, customers have many substitutes to choose from. D) In an oligopoly, firms have the ability to promote their products differently from competitors; while in perfect competition, product differentiation helps companies compete. E) In perfect competition, companies have total control over price because they can differentiate their products; while in an oligopoly, companies have no influence on the price.