7. Any large grocery store carries at least seven different kinds of corn chips—baked, fried, salsa-flavored, white, yellow, blue, and lime-flavored.

a. When is product differentiation real and when is it an illusion?

b. Is there an objective universal answer to a ?

c. Are there any individually objective answers to a and b ?

d. Does your answer to c tell you anything about the economic implication of the benefit of markets? (Hint: Is the assumption of rational consumers with well-ordered preference functions necessary to the arguments that markets benefit society?) (Institutionalist)