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Friday, December 21, 2007

A reminder on carbon-monoxide

I came across this report by the CDC concerning estimated carbon monoxide deaths by state for the years 1999-2004. The numbers are not that large, of course, but such deaths would seem easily preventable. Indeed, the CDC offers the following tips - most of which are common sense:



Here is another list



I grabbed the data and threw them into Stata and normalized CO deaths to be per 1000 people. Here are some sample satistics:


. sum codeaths codeathspc population efi south

Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
codeaths | 48 54.64583 44.04229 6 160
codeathspc | 48 .0122922 .0067379 .0022584 .0361905
population | 50 5482.24 5943.004 525 32521
efi | 50 6.652 .6085245 5.1 8.4
south | 50 .24 .4314191 0 1


What's the relationship between economic freedom and CO deaths? Thankfully, there is none. How about the relationship between CO deaths and unemployment? Nothing there either. How about regional differences? There we find a big difference. Southern states had, on average, 0.004 fewer deaths per 1,000 people over the five year period:


. reg codeathspc south

Source | SS df MS Number of obs = 48
-------------+------------------------------ F( 1, 46) = 3.61
Model | .000155148 1 .000155148 Prob > F = 0.0638
Residual | .001978623 46 .000043014 R-squared = 0.0727
-------------+------------------------------ Adj R-squared = 0.0526
Total | .002133771 47 .000045399 Root MSE = .00656

------------------------------------------------------------------------------
codeathspc | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
south | -.004152 .0021862 -1.90 0.064 -.0085525 .0002486
_cons | .0133302 .0010931 12.20 0.000 .01113 .0155305

Comments:
Alfred Yankovic's (Weird Al) parents died of Carbon Monoxide poisoning from their fireplace in 2004.

It makes sense that northern states see more CO deaths as southerners use their fire places less. Perhaps there would be a good reason to make a fire place with a timer that will shut off automatically. Do they make those?
 
Did population density or land price matter?
 
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