- EcoSim: An Interactive Simulation EcoSim is an interactive simulation in which each student plays the role of a company and a group of people, or a legislator in the government/central bank. EcoSim establishes among the players the same incentives and general restrictions that exist in the real world. As the simulation progresses, players create the same market forces within EcoSim that exist in ...ecedweb.unomaha.edu/ecosim.htm