The concept of fair and equitable treatment, which has assumed prominence in investment relations between States, provides a yardstick by which relations between foreign direct investors and Governments of capital-importing countries may be assessed. In addition to discussing this issue, the publication also takes stock and analysis of: trends in the use of the standards; and models based on State practice. The publication also gives insight into the interaction of fair and equitable treatment standard with other issues and concepts that arise in investment practice.