00:01
So here we are told about a perfectly competitive market for cheese.
00:03
So let's just draw it, right? it's never a bad idea just to draw it.
00:08
Demand is downward sloping, supply is upward sloping, and in equilibrium, the price is $12.
00:15
The government is now going to come along and impose a price ceiling of 10, right? what does that ceiling at 10 mean? well, it means that up here is illegal, and down here is okay.
00:27
So this can no longer happen.
00:30
Ruled out by the ceiling.
00:32
So the new equilibrium would be right here, right? this would be the quantity supply.
00:38
This would be the quantity demanded and this gap here would be the shortage.
00:44
Right.
00:45
So we are going to end up here at time one because if you've got four people selling and 10 people buying only four units can actually get sold.
00:55
You can't sell units, can't buy units that don't exist.
01:01
So let's go through the options.
01:02
A is wrong because quantity always falls.
01:11
It has nothing to do with elastic, right? when i drew these demand curves, i didn't tell you whether the demand is inelastic or elastic.
01:20
It doesn't make any difference.
01:22
Even if the demand is inelastic, quantity will still fall, right? if i draw a different demand curve, right? now demand is more elastic, but the quantity still falls.
01:33
It's irrelevant, right? so it makes no difference, right, if demand is inelastic or elastic.
01:41
Let's think about b.
01:44
Decrease producer surplus, plus total surplus...