Often to secure a monopoly, one must erect barriers to entry to ...

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Often to secure a monopoly, one must erect barriers to entry to obtain a monopoly. What is this activity called in general and what does it entail specifically?
 
  What will be an ideal response?

Question 2

List three characteristics of demand curves. Make sure to explain the shape of the curve and the meaning of the vertical and horizontal intercepts.
 
  What will be an ideal response?

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Answer to Question 1

Rent seeking is the term used to describe activities that are performed for the purpose of obtaining or retaining a monopoly. Specific activities might include lobbying, campaign contributions, bribery, lawsuits.

Answer to Question 2

First, they are downward sloping. Second, they intersect the vertical axis because there will be a price above which quantity demanded will be zero. Last, they intersect the horizontal axis. Even at a price of zero, quantity demanded will be limited for a given period of time.