Abstract: A major crisis or disaster attracts a response from multiple organizations. These organizations need to work together as a coalition. To do so effectively, they must share information. Differences in organizational culture give information a scarcity value, leading to the emergence of information markets. As the crisis progresses, organizations learn to work together, building up trust and lowering the “price” for information shared. Organizations that have worked together in previous crises have a price advantage. In short, the information sharing changes dynamically. Evolutionary game theory – And the minority game in particular – has been recently applied to markets in which physical goods are exchanged. This paper presents the first results from simulating an information sharing market in crisis response coalitions as a minority game.