Carl was the first amongst many to direct our attention to a new study by the GAO on the effects of piracy (covering all sectors, even toys, clothing, automobile parts, and medicine). The GAO's study unsurprisingly found that U.S. government and industry claims that piracy damages the economy to the tune of billions of dollars "cannot be substantiated due to the absence of underlying studies." The full GAO report is worth a read, and not only argues that claims of economic impact have not been based on substantive science -- but that file sharing can actually have a positive impact on sales:

"Some experts we interviewed and literature we reviewed identified potential positive economic effects of counterfeiting and piracy," The GAO wrote. "Some consumers may knowingly purchase a counterfeit or pirated product because it is less expensive than the genuine good or because the genuine good is unavailable, and they may experience positive effects from such purchases. Consumers may use pirated goods to 'sample' music, movies, software, or electronic games before purchasing legitimate copies," the GAO continued. "(This) may lead to increased sales of legitimate goods."