data one;
infile 'c:/website/gohttp/class/sas/table9.8' firstobs=2 ;
input qb y pb pl pp;
lpb=log(pb);
ly=log(y);
lqb=log(qb);
lpl=log(pl);
lpp=log(pp);
proc print;

proc sort;
by y;
data two;
set one;
t+1;
if t < 9;
proc print;
proc autoreg;
model lqb=lpb lpl ly;

data three;
set one;
t+1;
if t > 8;

PROC PRINT;
PROC AUTOREG;
model lqb=lpb lpl ly;

run;