NegoSim is a computer-assisted business simulation in which teams of 4 or 5 participants are in charge of managing virtual companies that compete in international markets. Over a period of three days, the teams simulate six quarters (eighteen months) in the life of their companies. In doing so, they make six sets of business decisions on product portfolio, pricing, advertising, marketing, manufacturing, human resources, finance, international expansion, alliances, R&D projects, etc. NegoSim makes it possible to compare the relative performance of the various teams after each set of decisions, based on stock price and market-to-book. In NegoSim, companies not only compete but also cooperate by negotiating and signing outsourcing agreements, strategic alliances and production joint-ventures.