This working paper first develops a Reference Case that allows required rates of return on investments in energy infrastructure to vary geographically. Those rates of return reflect an assessment of the risks associated with energy business investments in various countries. By comparison, the Base Case, which was presented in the working paper, The Baker Institute World Gas Trade Model, assumes the required rates of return on investments match those sought on similar projects in the United States. The working paper then contrasts selected scenarios with the Reference Case. The selected scenarios are meant to reflect a range of political actions and economic outcomes that could affect the world market for natural gas. The political scenarios selected for study were suggested by the kinds of events discussed in the historical case studies.