Am 10.10.2017 um 18:02 schrieb oleg_komashko(a)ukr.net:
mt1 <- tsls y 0 y1 y2 x1 x2; x1 x2 z1 z2 z3
mt1a <- tsls y 0 y1 y2 x1 x2; 0 x1 x2 z1 z2 z3
# mt1 and mt1a gives the same
catch tsls y 0 y1 y2 x1 x2; x1 x2 z1 z2
mt2 <- tsls y 0 y1 y2 x1 x2; 0 x1 x2 z1 z2
</hansl>
???
Sorry I'm probably too slow -- what did you expect and what did surprise
you (and why)?
thanks,
sven