This book recommends and examines the various approaches to incorporating an accurate measure of risk into the appraisal of an international investment. It considers the way in which decisions on international investment projects are taken and how they should be. It critiques and integrates existing theories, including the global capital asset pricing rule of financial theory, theories of strategy making and the real options approach, to show how risk should be incorporated into the present value formula and its various elements to produce a clear decision rule.