Amazon Sales Rank -> Copies Sold

This is an attempt to estimate the number of copies sold of a book per week given it’s sales rank at Amazon, including the ever popular power law like graph. This reminds me of the cattleman who I once heard complaining on the radio about how he found it very obnoxious that city folk would ask him how many head of cattle he owned. “Why that’s just like asking how much I’m worth!”

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