] Marijuana, pornography and illegal labour have created a
] hidden market in the United States which now accounts for
] as much as 10% of the American economy, according to a
] study. As a cash crop, marijuana is believed to have
] outstripped maize, and hardcore porn revenue is equal to
] Hollywood's domestic box office takings.

Guardian Unlimited | Special reports | With pot and porn outstripping corn, America's black economy is flying high