Since the end of World War II the dollar has played a double role, it has served as national currency of the US and as … key currency of the world economy. As world currency the dollar serves as "numeraire" for supranational flows and stocks … the world, but influence also the relative prices between commodities and manufactures, the terms of trade between …

economies have become increasingly interdependent in a process toward a supranational closed system, the world economy. However …