Identify a key concept or foundational theory from the first four weeks of class and in half a page discuss how it applies to your current work environment or a recent social, political or business event. Include the chapter and sub topic from your textbook. Should China revalue the yuan against the dollar? If so, what impact might this have on: (1) U.S. balance of payments, (2) Chinese balance of payments, (3) relative competitiveness of Mexico and Thailand, (4) firms such as Walmart, and (5) U.S. and Chinese retail consumers?