[Excerpt] This report assesses recent international developments as the leaders from a number of nations work to reach a consensus on an informal set of best practices regarding national restrictions on foreign investment for national security purposes. This report also provides one possible approach for assessing the costs and benefits involved in using national policies to direct or to restrict foreign direct investment for national security reasons. Within the United States, there is no consensus yet among Members of Congress or between the Congress and the Administration over a working set of parameters that establishes a functional definition of the national economic security implications of foreign direct investment. In part, this issue reflects differing assessments of the economic impact of foreign investment on the U.S. economy and differing political and philosophical convictions among Members and between the Congress and the Administration.