Try breaking that down by age and marital status.  See for instance: <a href="http:&#x2F;&#x2F;jonathansoma.com&#x2F;singles&#x2F;#1&#x2F;3&#x2F;2&#x2F;0" rel="nofollow">http:&#x2F;&#x2F;jonathansoma.com&#x2F;singles&#x2F;#1&#x2F;3&#x2F;2&#x2F;0</a><p>It certainly isn&#x27;t 2:1 - that was hyperbole - but it&#x27;s bad.  And it doesn&#x27;t actually take a large absolute difference to produce huge changes in behavior.  A standard economic model of this fact is explained nicely here: <a href="http:&#x2F;&#x2F;marginalrevolution.com&#x2F;marginalrevolution&#x2F;2010&#x2F;02&#x2F;revisiting-the-marriage-supermarket.html" rel="nofollow">http:&#x2F;&#x2F;marginalrevolution.com&#x2F;marginalrevolution&#x2F;2010&#x2F;02&#x2F;rev...</a> In the efficient market limit, an arbitrarily small perturbation in the effective gender ratio produces arbitrarily large changes in outcomes.