Dear WinBUGS developers,
I have a question about mv.car.
In the oral cavity and lung cancer
in West Yorkshire example given in the Manual, the spatial random effects
S are given a multivariate IAR (MIAR) prior. The full
conditional distribution of omega involves its Wishart prior and the
MIAR distribution for S. If S had proper MCAR a priori, the conditional of
omega should include det(V)^(-1/2), where V is the covariance
matrix of S which is a function of omega. But for MIAR, V is singular. I would
like to know how mv.car actually deal with this problem.
I have a similar question for the univariate case car.normal too, as we
usually give prior to the precision parameter tau.
Thank you very much for your time. WinBUGS is a great software. Thank you!
Best regards,
-haijun
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