How to Measure Anything: Finding the Value of Intangibles in Business

Somewhat related but more generally about estimation: Hubbard, How to Measure Anything https://www.amazon.com/How-Measure-Anything-Intangibles-Busi... (https://www.amazon.com/How-Measure-Anything-Intangibles-Business-ebook/dp/B00INUYS2U)

How to Measure Anything: Finding the Value of "Intangibles" in Business . A vital step in becoming a more (instrumentally) rational person is to track and calibrate your beliefs. This book teaches you of how to do that.