Investment in interdependent and long-term R&D programs is often distributed widely across firms to share the burdens of cost and uncertainty, and to allow individual organizations to focus on their areas of comparative advantage. A consequence is that any one firm can only evaluate and manage accurately the profitability of its R&D investments if it is aware of decisions and rates of progress being made by others. Our research is motivated by the challenge that firms face in exchanging such data without divulging proprietary knowledge or otherwise harming their individual interests. (PDF 441KB)