Litigation consultants work with law departments to map out case strategies, prepare courtroom exhibits, and provide forensic analysis. From a website came the following list:
Charles River Associates (Boston, MA); Decision Research (Boston, MA); Economic Analysis Corporation (Los Angeles, CA); Economists Incorporated (Washington DC); FinEcon (Los Angeles, CA); Law & Economics Consulting Group (Emeryville, CA); Lexecon (Chicago, IL); Litigation Sciences (Los Angeles, CA); Micronomics (Los Angeles, CA); National Economic Research Associates NERA (White Plains, NY); and Price Waterhouse (Los Angeles, CA and New York, NY).
There are certainly more firms in this neighborhood of the cottage industry that thrives off of law departments, but I wanted to start with a good list and invite readers to comment on other participants.