Re: RE: Re: Source of cancer data

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

On Thu, 3 Jan 2002, John Williams wrote:

>

> Cohen used county sales tax because that was the best data he could

> find to represent the county.  He used other sources to get at

> smoking rates but they were all less rigorous than the individual

> smoking histories obtained in case-control studies.  Remember with

> sales tax, many people cross the state boarders to get cheaper smokes.



	--My primary source of data on smoking frequency was Bureau of

Census studies in which hundreds of thousands of people (if I remember

right) were randomly sampled.



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