Very large amounts of money can be informally transferred through a network of bookees across a number of different countries. Such bookees possess or have access to large amounts of cash. Bookees in the destination country can disburse money to individuals upon request from the corresponding bookee in the origin country. More research needs to be done exploring the various informal methods of money laundering to identify participants and offenders who have heretofore gone unnoticed.
Bibliography
Featherstone, R. & Deflem, M. (2003). "Anomie and Strain: Context and Consequences of Merton's Two Theories." Sociological Inquiry 73(4):471-489.
Walker, John, and Brigitte Unger. "Measuring Global Money Laundering: The Walker Gravity Model." Review of Law & Economics. 5.2 (2009). Print.
18 USC § 1956 - LAUNDERING of MONETARY INSTRUMENTS
http://www.fatf-gafi.org/document/29/0,3746,en_32250379_32235720_33659613_1_1_1_1,00.html#howmuchmoneyislaunderedperyear...
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