Identify a growth industry, a mature industry, and a declining
industry. For each industry, identify the following: (a) the number
and size distribution of companies, (b) the nature of barriers to
entry, (c) the height of barriers to entry, and (d) the extent of
product differentiation. What do these factors tell you about the
nature of competition in each industry? What are the implications
for the company in terms of opportunities and threats?