Healthcare expenditure -v- life expectancy
May 4, 2012 2 Comments
A smart way to reduce the risk of confusing correlation with causation, especially when comparing different countries, is to plot the two variables of interest over time.
Here’s a nice example, showing that it’s likely the US has a less efficient healthcare system than other rich countries, and that the low life expectancy is not due to other confounding variables (e.g., having a higher homicide rate – something which has actually decreased over the time period shown).
More here by Lane Kenworthy
Marc Gawley 
That is interesting.
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