Bad News

he industry's critics agree that the function of the news is to inform people about social, political, cultural, ethical and economic issues so that they can vote and otherwise express themselves as responsible citizens. They agree on the related point that journalism is a profession rather than just a trade and therefore that journalists and their employers must not allow profit considerations to dominate, but must acknowledge an ethical duty to report the news accurately, soberly, without bias, reserving the expression of political preferences for the editorial page and its radio and television counterparts. The critics further agree, as they must, that 30 years ago news reporting was dominated by newspapers and by television network news and that the audiences for these media have declined with the rise of competing sources, notably cable television and the Web.

The audience decline is potentially fatal for newspapers. Not only has their daily readership dropped from 52.6 percent of adults in 1990 to 37.5 percent in 2000, but the drop is much steeper in the 20-to-49-year-old cohort, a generation that is, and as it ages will remain, much more comfortable with electronic media in general and the Web in particular than the current elderly are.

At this point the diagnosis splits along political lines. Liberals, including most journalists (because most journalists are liberals), believe that the decline of the formerly dominant ''mainstream'' media has caused a deterioration in quality. They attribute this decline to the rise of irresponsible journalism on the right, typified by the Fox News Channel (the most-watched cable television news channel), Rush Limbaugh's radio talk show and right-wing blogs by Matt Drudge and others. But they do not spare the mainstream media, which, they contend, provide in the name of balance an echo chamber for the right. To these critics, the deterioration of journalism is exemplified by the attack of the ''Swift boat'' Vietnam veterans on Senator John Kerry during the 2004 election campaign. The critics describe the attack as consisting of lies propagated by the new right-wing media and reported as news by mainstream media made supine by anxiety over their declining fortunes.

Critics on the right applaud the rise of the conservative media as a long-overdue corrective to the liberal bias of the mainstream media, which, according to Jim A. Kuypers, the author of ''Press Bias and Politics,'' are ''a partisan collective which both consciously and unconsciously attempts to persuade the public to accept its interpretation of the world as true.'' Fourteen percent of Americans describe themselves as liberals, and 26 percent as conservatives. The corresponding figures for journalists are 56 percent and 18 percent. This means that of all journalists who consider themselves either liberal or conservative, 76 percent consider themselves liberal, compared with only 35 percent of the public that has a stated political position.

So politically one-sided are the mainstream media, the right complains (while sliding over the fact that the owners and executives, as distinct from the working journalists, tend to be far less liberal), that not only do they slant the news in a liberal direction; they will stop at nothing to defeat conservative politicians and causes. The right points to the ''60 Minutes II'' broadcast in which Dan Rather paraded what were probably forged documents concerning George W. Bush's National Guard service, and to Newsweek's erroneous report, based on a single anonymous source, that an American interrogator had flushed a copy of the Koran down