Here is an article which examines this phenomenon in more depth: http://www.jstor.org/stable/pdf/2142320.pdf?acceptTC=true http://www.jstor.org/stable/pdf/21423

Here is an article which examines this phenomenon in more depth: http://www.jstor.org/stable/pdf/2142320.pdf?acceptTC=true http://www.jstor.org/stable/pdf/2142320.pdf?acceptTC=true