Hi Sven,
Yes, it was marked as discrete. I agree with you that this should be necessary
for proper ordered probit behavior.
PS
Sent from my iPad
> On Jan 7, 2015, at 3:50 AM, Sven Schreiber <svetosch(a)gmx.net> wrote:
>
>> Am 07.01.2015 um 02:00 schrieb Allin Cottrell:
>>
>>
>> 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.
>>
>
> Was that variable marked as discrete? I vaguely remember a discussion
> about the possibility to tell gretl that even non-integer data could
> come from a discrete variable. So from a user's point of view I'd say
> that (ordered) probit should work when the variable is "officially"
> discrete. If it's not marked as such *and* is not obviously discrete
> such as not being integer-valued I think (fwiw) it's ok if gretl refuses
> to do ordered probit on that.
>
> cheers,
> sven
>
>
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