What is the role of power counting in renormalisation?

[Bobhawke]

I have heard many people use the term power counting before but I can't find any explanation of what it means. All I know is that it is related to renormalisation somehow. Could someone explain to me what power counting is?

thanks

 

[distanceless]

I hope you can find what you want from this lecture.

http://arxiv.org/abs/nucl-th/0510023