Re: Cohen's Fallacy

["Rad health" <healthrad@HOTMAIL.COM>]

Again, you do not answer the question.  Why not follow Field's suggestion to 

actually determine the aggregarate bias.



>From: BERNARD L COHEN <blc+@PITT.EDU>

>Reply-To: BERNARD L COHEN <blc+@PITT.EDU>

>To: Rad health <healthrad@HOTMAIL.COM>

>CC: internet RADSAFE <radsafe@list.vanderbilt.edu>

>Subject: Re: Cohen's Fallacy

>Date: Tue, 29 Jan 2002 09:25:25 -0500 (EST)

>

>

>On Mon, 28 Jan 2002, Rad health wrote:

>

> >

> > I read the papers and I agree with Field, that you are confusing 

>individual

> > level confounding with group level confounding.  Why not follow Field's

> > suggestion and examine the source of the group level confounding?

> > You have no basis for guessing what the group level confounding is by

> > assuming it is the same as individual level confounding.

>

>	--I do not assume it is the same as individual level confounding.

>I would prefer to discuss this in terms of particular example. Let's

>consider my treatment of what I call "the Lubin effect" in my paper in

>Health Physics 75:18-22;1998. Let me know what you don't agree with in

>that paper.

>

> > >

> > >	--I would prefer if you read my paper, but very briefly, I make

> > >assumptions about them, calculate what correlations are necessary to

> > >explain my data, and consider the plausibility of these required

> > >correlations judged by my studies of hundreds of other factors whose

> > >correlations with radon I have investigated.

>

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