To graph a relationship involving more than two variables, we use which assumption?

Which of the following is the most important pre-requisite to a well-functioning market economy?

A) Goods must be non-scarce. B) Everyone must have an adequate income. C) Participants must follow some clear, general rules. D) People must have roughly similar tastes and preferences. E) There must be approximate equality of incomes.

Another term for intermediaries who specialize in reducing transaction costs is

A) service providers. B) consultants. C) middlemen. D) revenue agents.