In: Economics
The index of industrial production (IPt) is a monthly time series that measures the quantity of industrial commodities produced in a given month. This problem uses data on this index for the United States. All regressions are estimated over the sample period 1960:1 through2000:12 (that is, January 1960 through December 2000). Let , Yt=1200xln(IPt/IPt-1), which gives the monthly percentage change in the industrial production index measured in percentage points at an annual rate. Suppose that a forecaster estimates the following AR(4) model for Yt :
.Yt=1.377 + .318Yt-1 + .123Yt-2 + .068Yt-3 + .001Yt-4
Use this AR(4) model to forecast the value of in January 2001 using the following values of Yt for August 2000 through December 2000:
| 
 Date  | 
 2000:7  | 
 2000:8  | 
 2000:9  | 
 2000:10  | 
 2000:11  | 
 2000:12  | 
| 
 IP  | 
 147.595  | 
 148.650  | 
 148.973  | 
 148.660  | 
 148.206  | 
 147.300  |