13. In regards to total surplus, which statement is true?
a. There is always too little entry in monopolistic competition, due to barriers to entry.
*b. There is always too little entry in monopolistic competition due to the product variety effect.
c. There is always too little entry in a monopolistically competitive industry due to the business-
stealing effect.
d. There is always too much entry in a monopolistically competitive industry, as in the long run firm
produce more than the quantity that will minimise average total costs of production.
e. None of the above.