What is the importance of defining the market in the pharmaceutical industry?

I- A company needs to understand who its real and potential competitors are for the products it currently sells or could sell in the future.
II- The definition of the market is important for government decisions regarding mergers and acquisitions.
III- The definition of the market is important for setting the price of a new drug.
IV- The definition of the market is important for projecting the revenues that can be obtained with a new drug.
V- The definition of the market is important for evaluating investments in the pharmaceutical industry.