Bootstrapping and robust SE cause errors

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Joined: Sun Dec 30, 2018 3:00 pm

Bootstrapping and robust SE cause errors

Post by DrE »

I am running a general linear model in gamlj. The model runs without errors, but has a number of assumptions violations. When I address the assumption violations by using robust standard errors I get this error message:
1-Non-standard coefficient covariance matrix may not be used for model with aliased coefficients.
When I bootstrap the CI I get this error:
2-Replacement has x rows data has y.
The surprising thing is that without bootstrapping or using robust SE there are no error messages. Any idea why or how to correct this?
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Posts: 448
Joined: Thu Mar 23, 2017 9:24 pm

Re: Bootstrapping and robust SE cause errors

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Make sure the model is correct, check that all effects are estimable and all coefficients are estimated. If the model cannot be estimated, robust standard errors cannot be computed
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