00:01
How much does aggregate demand need to change to restore the economy to its long -run equilibrium? so the point where all three of these intersect is the long -run equilibrium.
00:33
We see that aggregate demand has shifted to the left.
00:41
We want to restore it to long -run equilibrium.
01:00
So we see that at the initial equilibrium, gdp was 400 billion and then the aggregate demand curve shifted.
01:21
So then we look at the price level that we were initially at where all three of the lines crossed.
01:32
So at the price level of 100, we're going to see what the real gdp based off of 81 is.
01:40
So that's the curve after the shift.
01:44
So we look at the thick dashed line and then you can see that it looks like the real gdp is a little less than 240.
02:07
So it's about 230.
02:10
So now we can calculate how much aggregate demand needs to change.
02:21
So the output needs to change to shift 81 to the initial 80.
02:52
So we find that the difference is 170...