RE: Cohen's Ecologic Studies

[epirad@mchsi.com]

Ted,



I stand by my first response to you.  One can not 

compare shield design to testing the validity of the 

linear nonthreshold theory using soft aggregate data 

from 1,600 counties.  



As far as a specific credible example, that has already 

been done in Dr. Lubin's recent paper.  Have you read it 

yet?  



Bill Field



> > A specific, credible example is cross-level bias and

> confounding at the group level.

> 

> You're still talking generics!  You're telling us of things that could go

> wrong.  Maybe he didn't account for the phase of the moon.

> 

> If "cross-level bias and confounding at the group level" can invalidate his

> results, surely you can think of some numbers that would demonstrate it.

> All that is required is that the numbers be credible--you don't have to show

> that they are true.

> 

> Why can't you show us?  I can tell you how much excess reactivity, or how

> much deficiency in shielding--in numbers--could invalidate a given reactor

> design.  That is much more convincing that philosophizing about possible

> generic problems.  If you can't think of any examples of how this might

> actually work, can you blame some of us for questioning your arguments on

> the basis of what kinds of generic limitations might create a problem.

> 

> Ted

> 

> 

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