00:01
Hi guys, how you doing? today we start chapter 35 with question one.
00:05
Suppose the natural rate of unemployment is 6%.
00:07
On one graph, draw two phillips curves that describe the four situations listed here.
00:12
All right, so first of all, let's remember the basic equation, the basic linear equation that describes the short run tradeoff between unemployment and inflation.
00:23
In other words, the short run phillips curve.
00:26
I have written down here on the left, and the question, reads unemployment u equals to the natural level of unemployment u star minus alpha which is a parameter that defines the slope of the equation times pi minus pi here i use the greek letter pi to denote the inflation rate and pi e the expected inflation rate so one of the very important piece of information we got out of this equation is that when determined the parenthesis is zero meaning when pi equals a pi the level of unemployment is equal to the natural level of unemployment this means that the short run phillips curve will dissect the long run phillips curve which is always vertical at a point where expected inflation actual inflation are equal to each other so what we know by that is that if we want to draw a phillips curve with that is consistent with a three percent level of expected inflation we should draw one that and long -run phillips curve at 3%.
01:34
All right, in this exactly what i've done here, the srpc 1 is a short -end phillips curve consistent with the 3 % expect inflation rate.
01:44
As you can see, it dissect the long -end phillips curve of 3%.
01:48
And likewise, the higher phillips curve, srpc2, is consistent with an expected rate of inflation equal to 5%.
01:57
So now our questions are very easy.
01:59
Part 1 says actual inflation is 5%, expect inflation is 3.
02:04
Well, expect inflation is 3%, so we are at srpc1...