To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.
The book itself is great - good discussion of asset classes, and some nice research presented. I’m well-read on this topic, and still found many gems of new data. An “asset” to anyone doing serious investment analysis.
Skip the audiobook, though. The reader stifles yawns, mispronounces words like “arbitrage”, and makes errors like saying “compromising” when clearly “comprising” was the word. It makes the material seem amateur. Read the actual book instead.