Danger of using spreadsheets

The dangers of using spreadsheets for calculations should never be underestimated, it’s so easy to make a copy paste error, or inadvertently corrupt your calculation. But it seems from reports that this may have been one of the more costly mistakes, and somehow not picked up by the peer review process, or public dissemination sufficient to reproduce the results. Economists from Harvard studied debt and GDP growth level and found that a 90% GDP ratio was a magic number which was bad for the economy, but recently an undergraduate repeated there calculations and found they were wrong (-0.1% GDP growth predicted should have been +2.2% growth). This results has been quoted by policy leaders to justify austerity measures around the world. The economists stand by their conclusions.

Correlation is not causation?

Link to youtube video by Liberal Viewer

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