00:01
So here we're talking about elasticity, and we're told that the price elasticity, which is the percentage change in quantity over the percentage change in price, is minus 0 .25.
00:12
And we know also that the quantity is $360 billion.
00:16
So here in question a, we want to increase the price by 50%.
00:24
Right? and if we increase the price by 50%, we can see that the percentage change in the quantity demanded would be minus 0 .25 times 50 % is equal to minus 12 .5%.
00:37
Right.
00:37
So that would be the effect.
00:39
The quantity of cigarettes would fall by 12 .5%.
00:43
And if we multiply that by the quantity that we know, we can get the change.
00:50
So quantity falls by 45 billion, which is equal to minus 12 .5 % percent.
01:03
Times 360, right? so we are losing 12 .5 % of the quantity.
01:12
B, b, the tax is more effective if elastic.
01:27
And the simple way to do that is just to think about what would happen...