Chapter 9
Recommendation Tasks
“The determination of the value of an item must not be based on its price, but rather on the utility it ultimately yields.”
—Daniel Bernoulli, Exposition of a New Theory on the Measurement of Risk, 1738
An old quote attributed to St. Francis of Assisi says that the ideal way to approach life is to start by doing what’s necessary and moving later to what’s possible. Skipping over the final statement that by doing so, one would suddenly be doing the impossible, it’s inevitable to see here some sort of implicit ranking applied to the things of life.
When you have a large volume of data to make sense of, you have to start somewhere and just starting from the beginning is not always an option because no end and no beginning ...
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