*
* Example 5.1.1 from pp 143-144
*
open data dowj.dat
data(format=free,org=columns) 1 78 dowj
*
@bjident(diffs=1,number=30) dowj
*
set ddow = dowj-dowj{1}
*
boxjenk(method=init,maxl,demean,ar=1) ddow
*
@yulelags(type=aic,max=27,table) ddow