Thursday, December 29, 2005

st: suest for intreg


Is it possible to use suest for intreg when some of the intervals are not bounded (i.e. < -&#8734; , a] or [b, &#8734; > )?

I am trying to test differences in coefficients across two intreg models. In both models I have censored data, i.e. only a maximum or minimum value is specified.

When using suest I get the following error message: “Score variables for model X contain missing values”

Even though suest seems possible when using intreg, see example:

suest requires the predict, score option to give non-missing values, so I guess that’s where it goes wrong.

Any solutions to work around it, or suggestions how to test differences in coefficients differently?

Many thanks, Bart Vanneste

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