5Christopher L. Bach, " U. S. Intematlonal Transactions in 2007," April 2008, http://www. bea. gov/scb/pdf/ 2008/04% 20Apfil/0408_ita - text. pdf.
6Elena L. Nguyen, "The International Investment Position of the United States at Yearend 2006," July 2007, p. 19, http://www.bea. gov/scb/pdf/2007/07% 20July/0707_ iip. pdf.
7Jeffrey H. Lowe, U. s. Direct Investment Abroad : Detail for Historical - Cost Position and Related Capital and Income Flows, 2004 - 2006 September 2007, p. 78, http://www. bea. gov/scb/pdf/2007/ 09% 20September/0907_ usdiatext. pdf.
8Jeffrey H. Lowe, "Foreign Direct Investment in the United States Detail for Historical - Cost Position and Related Capital and Income Flows, 2004 -2006," September 2007, p. 37, http://www. bea. gov/ seb/pdf/2007/09 % 20September/O907_fdiustext. pdf.
9Bureau of Economic Analysis, International Investment Position of the United States at Yearend, 2006 and2007, June 27,2008, http:// www. bea. gov/intemational/xls/intinv07_tl. xls.
10Elena L. Nguyen, "The International Investment Position of the United States at Yearend 2006," July 2007, p. 17, http://www. bea. gov/scb/pdf/2007/07 % 20 July/0707 _iip. pdf.
