freq a;
smpl 1983 2002;
read(file='h:ex3-3.xls');
olsq ce c yd yd1;
ste=@res/@s;
graph date ste;
?
? VIF’l
?
olsq yd c yd1;
r2yd = @rsq;
vifyd = 1/(1-r2yd);
olsq yd1 c yd;
r2yd1 = @rsq;
vifyd1 = 1/(1-r2yd1);
print vifyd vifyd1;
end;