On Tue, 6 Jan 2015, Summers, Peter wrote:
> [T]he ordered probit thing is still there. I'm using a script with
> generic notation "model4 <- probit y 0 x(-1 to -5)." I get the
> same result (lagged y included) via the gui, but running your
> script works as expected (no lagged y). I'll send you my data and
> a script that generates the weirdness off-list.
Thanks. After looking at Peter's data and script I can see what's
happening.
Ordered probit is misbehaving when the dependent variable is not
integer-valued. (Peter's dependent variable has values {0.5, 1, 1.5,
2.5, 3, 3.5, 4, 4.5, 5, 6, 6.5, 7.5, 12}.) We'll take a closer look
at this -- with a view to either handling correctly or rejecting
such data -- but in the meantime a workaround would be to multiply
the dependent variable by 2, in which case it should be treated
correctly.
Allin
