Just Shut Up

More ink equals more blood, claim two economists who say that newspaper coverage of terrorist incidents leads directly to more attacks.

It's a macabre example of win-win in what economists call a "common-interest game," say Bruno S. Frey of the University of Zurich and Dominic Rohner of Cambridge University.

"Both the media and terrorists benefit from terrorist incidents," their study contends. Terrorists get free publicity for themselves and their cause. The media, meanwhile, make money "as reports of terror attacks increase newspaper sales and the number of television viewers."

The researchers counted direct references to terrorism between 1998 and 2005 in the New York Times and Neue Zuercher Zeitung, a respected Swiss newspaper. They also collected data on terrorist attacks around the world during that period. Using a statistical procedure called the Granger Causality Test, they attempted to determine whether more coverage directly led to more attacks.

The results, they said, were unequivocal: Coverage caused more attacks, and attacks caused more coverage -- a mutually beneficial spiral of death that they say has increased because of a heightened interest in terrorism since Sept. 11, 2001.

One partial solution: Deny groups publicity by not publicly naming the attackers, Frey said. But won't they become known anyway through informal channels such as the Internet?

Not necessarily, Frey said. "Many experiences show us that in virtually all cases several groups claimed responsibility for a particular terrorist act. I would like the same rule that obtains within a country: Nobody can be called a criminal -- in our case a terrorist -- if this has not been established by a court of law."