Ambition Often Exceeds Talent: I know of very few examples in which an exceptional writer got caught plagiarizing. Sometimes writers accept jobs or assignments beyond their talents. When the deadline whistle blows, they find themselves facing this cost-benefit quandary: Shall I tell the truth and bail, damaging my career for sure, or shall I steal copy and only risk damaging my career?

Writing Is Hard Work: A corollary to ambition exceeding talent. Even prolific writers, who can toss off a thousand words an hour, complain about the difficulty of writing. Writing well is a difficult enterprise. So is writing poorly. With so many examples of good writing out there to "borrow," why suffer only to write poorly?

The Thrill Factor: As anybody who has ever shoplifted a pack of Bazooka bubble gum can tell you, people steal not only for material gain but for psychic gain. It's a gas to pad the company expense account, leave a restaurant without paying, or rifle though a friend's medicine cabinet to steal his most potent medications.

Evening the Score: If you hate your boss at the car factory, you might express your fury by sabotaging every tenth car on the line. If you hate your editor or your publication, perhaps you stick it to him by plagiarizing. It doesn't make sense, but neither does sabotaging every tenth car.

Force of Habit: If nobody catches you running stop lights in college or tickets you for doing the same at your first newspaper job, you eventually stop paying attention. One day, red, yellow, and green all mean "go."

Contempt for the Business: Show me the writer who calls himself and everybody he works with a "hack," and I'll show you a potential plagiarist.

Even If You Get Caught, You'll Probably Get Away With It: Trudy Lieberman reported in the July/August 1995 Columbia Journalism Review that many journalists caught plagiarizing paid little or no price for their transgressions. Lieberman describes a "circle-the-wagons" mentality in the news business when plagiarism breaks out. Providing a number of examples, she also notes the double standard of journalists who gave Sen. Joseph Biden holy grief when he committed plagiarism in a presidential campaign speech but cut their colleagues slack.