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st: Unexpected Marginsplot Error Bars
From
Alistair Windsor <[email protected]>
To
[email protected]
Subject
st: Unexpected Marginsplot Error Bars
Date
Sun, 18 Nov 2012 22:14:30 -0600
For my wife's research we are running some zinb regressions. The
indepvars for the inflate are a small subset of the total set of indepvars.
When we run the following commands
zinb depvar indepvars, inflate(indepvars) nolog iterate(20) robust
cluster(ccode)
margins, predict(n)
marginsplot
we get a plot whose error bars stretch below 0. This seems impossible
give that the negative binomial takes only non-negative values.
Am I missing something?
--
Alistair Windsor
Tigers Teach Co-Director and S-STEM PI
Assistant Professor, Department of Mathematical Sciences
355 Dunn Hall Ph: 901-678-4431
University of Memphis Fax: 901-678-2480
Memphis, TN 38152-3240
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