IP Valuation: a good introduction

Since by no means all of the readers of this weblog also follow the IPKat, I thought it advisable to draw the attention of readers to this piece by Dr Nicola Searle which was posted on the IPKat this afternoon on IP valuation.  Dr Searle's article, replete with links to basic concepts, some leading thinkers and their works, provides a good introduction to the topic for those who are not yet familiar with it.