There is a chapter in Tom Slee's (excellent) book "What's Yours is Mine: Against the Sharing Economy" which goes into depth about rep systems and product rating

There is a chapter in Tom Slee's (excellent) book "What's Yours is Mine: Against the Sharing Economy" which goes into depth about rep systems and product ratings, why they are different, and why rep systems are a bad way to measure things. There are a bunch of footnotes. I recommend it if you are looking for an even more critical take.