Study with @piffer_davide (or rather his study, which I hijacked...)
US county-level data does not support negative effect of fluoride on intel. True in multi-regression too. http://rpubs.com/EmilOWK/fluoride_water_intelligence_US_counties …pic.twitter.com/5jhRLSVFo8
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not that i'm a believer in the fluoride fears, but did you try controlling for % rural?
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Controlled for spatial autocorrelation via spatial lag. Don't have an urbanity variable. Here's a model with farming occupation. No change.pic.twitter.com/aGBJZcKK2G
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not sure farming etc are good proxies for rural these days. can't say i've checked tho
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Then find me some county-level data to use? Not so lazy now. :)
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just emailed you a file with the data
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you want to divide rural_pop/total_pop
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