Re: Presentation on Ecologic Studies

["R. William Field" <bill-field@UIOWA.EDU>]

Dr. Cohen,



My mistake.  The post was meant for someone else, not the list. However, I

think the limitations presented in the slide presentation below is

applicable to all ecologic studies including yours.  However, we have been

down that path before.



Bill Field





----- Original Message -----

From: BERNARD L COHEN <blc+@pitt.edu>

To: R. William Field <bill-field@UIOWA.EDU>

Cc: <radsafe@list.vanderbilt.edu>

Sent: Wednesday, March 20, 2002 10:16 AM

Subject: Re: Presentation on Ecologic Studies





>

> On Tue, 19 Mar 2002, R. William Field wrote:

> >

> >   This excelllent presentation that provides some of the limitations of

ecologic studies can be found here:

> >   http://www.pitt.edu/~super1/lecture/lec1691/001.htm

>

> -Perhaps I am paranoic, but I interpret this as a shot at my test

> of LNT based on my ecological study of lung cancer rates vs average radon

> levels in U.S. counties. If anyone wants to point out one of the examples

> in that presentation, I will show why it does not apply to my study.

> Better yet, if anyone can expand one of those examples into a specific

> proposal for explaining my results, they should submit a letter to Health

> Physics and if it is accepted for publication, they will automatically get

> a $1000 reward. By "specific", I mean something definite enough to do

> calculations on.



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