“Cost savings [in joint litigation support efforts] can be considerable in all aspects of the document discovery process – savings typically range from 40% to 60%.” This estimate came from an article by a lawyer, Clyde Hettrick, Director of Legal Research at LRN – The Legal Knowledge Company.
The article explains how some plaintiffs and defendants have joined together to share the costs associated with automating case-related information. Document production, document management, and information retrieval are all areas where cost savings can be realized, yet with protections for adversaries to keep confidential their work product and strategy.
Makes sense to me, and this article offers a framework, with specifics, for entering into such an arrangement.