Here is an article which examines this phenomenon in more depth: <a href="http:&#x2F;&#x2F;www.jstor.org&#x2F;stable&#x2F;pdf&#x2F;2142320.pdf?acceptTC=true" rel="nofollow">http:&#x2F;&#x2F;www.jstor.org&#x2F;stable&#x2F;pdf&#x2F;2142320.pdf?acceptTC=true</a>