OK now I run the program: CALENDAR(M) 1973:11 OPEN DATA "C:\Users\User\Desktop\110722 Energy RATS\dataus.txt" DATA(FORMAT=PRN,NOLABELS,ORG=COLUMNS,TOP=2,RIGHT=3) 1973:11 2007:10 DATES OIL IPI /* PRE-ESTIMATION */ dec symm[series] hhs(2,2) clear(zeros) hhs equation oileq oil # constant hhs(...