29. the concept of market efficiency in a perfectly competitive market
30. the concepts of consumer surplus, producer surplus, total surplus, deadweight loss
31. the efficiency of market equilibrium, i.e. maximising total surplus
32. how under- and overproduction in a market can result in a deadweight loss
33. the effects of a tax and a subsidy on a market
34. the effects of a price ceiling and a price floor on a market