Re: Cross-level bias

[BERNARD L COHEN <blc+@PITT.EDU>]

On Tue, 8 Jan 2002, John Williams wrote:



> Dr. Cohen,

>

> Other factors co-corellate with smoking such as socioeconomic status,

> tendency to move more often etc.  These do not vary linearly between

> or within counties, therefore it is impossible to perform simplistic

> aggregate corrections as you do.



	--I don't think you have examined my papers in any detail. I do

not assume linear relations for confounders and I do no make "corrections"

for confounders.

	Why don't you submit a letter to Health Physics about your issues?



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