1. Is the online book retail (e.g. Amazon.com) industry qualified as a perfectly competitive market by the four market characters listed in the lecture note? If not, which character(s) is (are) not qualified? Please discuss it briefly.
2. Microsoft has been a giant in the software industry. Can we define Microsoft as a monopoly? Please explain. In addition, whether the Learner Index works well to define the market power for Microsoft in the software industry? Explain your answer.