For some years i've been teaching the concept of Brand Equity in my classes, based on Aaker and Keller - lately solely on Keller. I find the idea itself very useful as a way to translate the added value of the brand to a company's market proposition; besides, companies may make the Brand itself as the most significant part of their proposition in certain industries and models (like licensing).
I understand Aaker tried for a company oriented definition and Keller for a consumer-based definition, but i think they complement each other; i would like to know if there were any newer authors, newer constructions, worth assessing.
(also, i find Kapferer more useful to other aspects of Brand Mgmt, and i confess i've had trouble in making deChernatony palatable for undergraduate level)
thank you,
Paulo L