Employment/Unemployment - the role of self-employment in the data

very useful and timely comment on what is happening to the structure of employment, i.e. the rising tide of self-employment. As a concept, there are different angles to self-employment; it is not an either/or subject (is anything?), and being able to talk coherently in the exam about this will be very helpful for you:

http://www.tutor2u.net/blog/index.php/economics/comments/the-happy-band-of-the-self-employed

and here is a little infographic showing why (and who) some of the self-employed are:

http://blog.vonage.co.uk/2014-08-14/anatomy-of-a-freelancer/