Over the past few years, I have come across all sorts of research on Net Promoter Score. Some of it positive and some of it negative, but never in the same place or easy to access. Typically, organisations only link to the research that supports their case.
So I thought that it would be a good idea to provide a list of all the Net Promoter Score research in one place. This list is targeted at what I would call primary research that adds to the body of knowledge of the efficacy of the Net Promoter® approach. I am not planning to add links to general commentary on NPS®.