Re: Radon and Smoking (individual vs aggregate)

[Kai Kaletsch <info@eic.nu>]

From: "Field, R. William" <bill-field@UIOWA.EDU>



> We did not see any changes that would produce a 10% change.

>

> The 10% difference is in Dr. Cohen's aggregate data.

....> Most people's heating bill is impacted by the temperature outside.

>



Hmmm, now I'm confused. I don't have the 1991 paper, but in HP Vol68, No2,

pg 167, Cohen writes:

"houses of smokers have 10% lower radon levels than houses of non-smokers,

which is a direct radon-smoking correlation on the level of individuals (as

opposed to a correlation on the level of counties)."



So, is the correlation on an individual or an aggregate basis?



(Gas prices also affect heating bills, but one could normalize to the

heating bills of controls.)



Kai



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