balance

[Peter Cameron]

On Wed, Oct 08, 2003 at 11:36:01AM -0400, J. P. Morgan wrote:
> I believe the defn of
> efficiency balance is that the matrix R^{-1/2}NR^{-1/2} has v-1 nonzero,
> identical eigenvalues (that's what we wrote in the external rep). I was
> pointing out that R^{-1/2}NR^{-1/2} can have this property without being
> constant on-diagonal and off-diagonal. That would mean t-balance of
> R^{-1/2}NR^{-1/2} would not necessarily be equivalent to efficiency balance
> (also if I have understood defns correctly). JP 
>
You are right.

Peter.