Claude Barfield, a former consultant to the office of the US Trade Representative, researches international trade policy (including trade policy in China and East Asia), the World Trade Organization (WTO), intellectual property, and science and technology policy. His many books and publications include Swap: How Trade Works with Philip Levy, a concise introduction to the principles of world economics, and Telecoms and the Huawei conundrum: Chinese foreign direct investment in the United States, an AEI Economic Studies analysis that explores the case of Chinese telecom equipment maker Huawei and its commitment to long-term investment in the US.