[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
st: RE: Constraining Weibull Parameter p
> How do I impose the restriction that the shape parameter p
> of the weibull
> distribution is less than 1 (i.e. monotonic decreasing
> hazardfunction) ?
> constraint define 1 [equation_name]coeff_name ??? < 1
> weibull t, dead(dead) hazard constraint(1)
As I understand it, -constraint- only accepts constraints
definable as equalities.
Perhaps there is some algebraic
re-expression of the model which
would satisfy this inequality indirectly.
On the other hand: If this
assumption is realistic, you should
not need a constraint. If this
assumption is not realistic, what
justifies this desire for force?
* For searches and help try: