Forum Moderators: open
Coke Cola shoes? Hey, don't laugh--it's worth something.
Coke Cola water? Confusing.
Coke Cola cow manure? Coke will say, no thanks, we need to protect our brand.
Coke Cola candy? Let's talk! Who do you think will make the most from each sale--the candy guy or Coke? (Answer: Coke. Why? They've done all of the hard work for the candy guy.)
Harvard Business Review (hbr.org) has some good articles on this. Not free, but quality stuff. Search on "value of brand," and Value of good will" both.
But, branding is valuable. For example, it's not widely known, but Kraft--which owns several powerful coffee brands (Maxwell House, etc.) nevertheless leased the Starbucks brand to sell a upscale bagged coffee in supermarkets.
(Thanks for getting the Coke water joke folks.)