I've got a part-time job <a href="http://www.formbysurveys.com/clubmedjobspt-74c8.pdf">paramedicalservicesva.com</a>  I believe that there is a much simpler reason for Amazon’s poor earnings performance:  They simply do not hold a leadership position in any major category.  To see what I mean, let’s look at three: retail, web services and tablets.