Url changed from <a href="http:&#x2F;&#x2F;marginalrevolution.com&#x2F;marginalrevolution&#x2F;2016&#x2F;05&#x2F;economist-removed-from-plane-for-algebra.html" rel="nofollow">http:&#x2F;&#x2F;marginalrevolution.com&#x2F;marginalrevolution&#x2F;2016&#x2F;05&#x2F;eco...</a>, which points to this. We&#x27;ll keep its more sensible title though.