Businesses need to know who their customers are, and how much money they should invest in marketing to them. It’s an obvious idea, but it also served as pretty much the sum of my knowledge of Customer Lifetime Value (CLV). That is, until Edward Malthouse came into my life. Ed’s
This is the last post in my recent series of articles on computing contours in SAS. Last month a SAS customer asked how to compute the contours of the bivariate normal cumulative distribution function (CDF). Answering that question in a single blog post would have resulted in a long article,
I've written several articles that show how to generate permutations in SAS. In the SAS DATA step, you can use the ALLPEM subroutine to generate all permutations of a DATA step array that contain a small number (18 or fewer) elements. In addition, the PLAN procedure enables you to generate
