The purchase of a virtual item from an online company with a virtual currency causes the nation's:

A competitive market structure differs from the monopoly, oligopoly, and monopolistic competition structures in the

A) producers' ability to set price. B) profit maximization condition. C) amount of long-run profit. D) entry conditions.

To develop a useful picture of a firm's behavior, economists assume that the

a. firm's goal is to maximize total revenue b. firm's goal is to maximize profit c. firm's goal is to minimize marginal cost d. roles of owner, manager and worker are performed by the same individuals e. roles of owner, manager and worker are interchangeable