This is the message I get when I use the command ( oprobit y
i.gender c.x c.x#c.x i.gender#(c.x#c.x) )
"invalid interaction specification;
multiple 'o' operators attached to a single variable are not allowed
within an interaction specification{p_end}"
The same command works if I use a linear model that is regress y
i.gender c.x c.x#c.x i.gender#(c.x#c.x).
Thanks in advance
Giuseppe
<>
" but it does not work".
What exactly does not work? Note the FAQ onthis point...
HTH
Martin
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