1. US International Transactions Accounts. Washington: US Department of Commerce;Available at www.bea.gov,2009
2. Th e Payoff to America from Global Integration;Scott Bradford;Th e United States and the World Economy,2005
3. Trade in Information Technology Goods: Adapting the ITA to 21 st Century Technological Change. ECIPE Working Paper 06;Iana Dreyer;European Centre for International Political Economy,2008