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Official March 2000 French Parliamentary Report on the obstacles on the control and repression of financial criminal activity and of money-laundering in Europe by French MPs Vincent Peillon and Arnaud Montebourg, third section on "Luxembourg's political dependency toward the financial sector: the Clearstream affair" (pp. 83–111 on PDF version)

The Underground Economy from National Center for Policy Analysis  (1998)

Going Underground: America's Shadow Economy by Jim McTague  (2005)

The Underground Economy: Global Evidence of Its Size and Impact  (1997)

The Effects of a Black Market Using Supply and Demand

Information on Black Market products

Economist, 11 August 2010, A lengthening shadow: Shadow economies have grown since the financial crisis began