One way by which firms differentiate their products is to find a market niche

Robinson Crusoe divides his time between catching fish and gathering fruit. Part of his production possibilities frontier is given in the above table

If Mr. Crusoe is on his PPF and he increases the amount of fruit he gathers from 56 to 90 pounds, the opportunity cost is A) 37 pounds of fish. B) 31 pounds of fish. C) 17 pounds of fish. D) 34 pounds of fruit. E) 90 pounds of fruit.

According to your text, the so-called "Superbowl Effect"

A) is an example of a mere statistical correlation. B) is an example of correct cause-and-effect reasoning. C) is a sound discovery in economic theory. D) is based upon a false set of facts.