Old tails: a crude power law fit on ebook sales
We use R to take a very brief look at the distribution of e-book sales on Amazon.com.
Living in A Lognormal World
Recently, we had a client come to us with (among other things) the following question: Who is more valuable, Customer Type A, or Customer Type B? This client already tracked the net profit and loss generated by every customer who used his services, and had begun to analyze his customers […]