The natural unemployment rate increased significantly during the 1980s and the 1990s

Using a broad definition, a firm would have a monopoly if

A) it produced a product that has no close substitutes. B) it does not have to collude with any other producer to earn an economic profit. C) it can make decisions regarding price and output without violating antitrust laws. D) there is no other firm selling a substitute for its product close enough that its economic profits are competed away in the long run.

Explain how derivates were used to increase risk making the financial crisis of 2007-2009 more severe