Dear All

1)

I'm fitting spatial CAR models

using R2Winbugs and although everything seems to go reasonably well (or I
think so)

the next message appears from WINBUGS 1.4 window:

gen.inits()
Command #Bugs: gen.inits cannot be executed (is greyed out)

The question is if this message means that something is wrong and the
results are consequently wrong, or Can I assume it as a simple warning
message???...

I've tried to fit the model using just WinBugs (not calling form R) and
gen.inits command is available and the results obtain are practically the
same...

2)

The other question is, once several bayesian CAR models are fitted I use DIC
to model selection

How can I compare DIC with AIC or BIC obtain for a spatial glm? I mean for
example:

- DIC of 300 and Pd of 32

versus

- BIC of 220 and Effective dimension (measured of trace of hat matrix) equal
to 14

* I've read that DIC is intended as a generalisation of Akaike's Information
Criterion (AIC), but is it possible to compare them simply looking which is
the lowest???


Thanks,

Dae-Jin Lee

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