Some years ago, the economist George Akerlof found himself faced with a simple task: mailing a box of clothes from India, where he was living, to the United States. The clothes belonged to his friend and colleague Joseph Stiglitz, who had left them behind when visiting, so Akerlof was eager to send the box off. But there was a problem. The combination of Indian bureaucracy and what Akerlof called “my own ineptitude in such matters” meant that doing so was going to be a hassle—indeed, he estimated that it would take an entire workday. So he put off dealing with it, week after week. This went on for more than eight months, and it was only shortly before Akerlof himself returned home that he managed to solve his problem: another friend happened to be sending some things back to the U.S., and Akerlof was able to add Stiglitz’s clothes to the shipment. Given the vagaries of intercontinental mail, it’s possible that Akerlof made it back to the States before Stiglitz’s shirts did.

There’s something comforting about this story: even Nobel-winning economists procrastinate! Many of us go through life with an array of undone tasks, large and small, nibbling at our conscience. But Akerlof saw the experience, for all its familiarity, as mysterious. He genuinely intended to send the box to his friend, yet, as he wrote, in a paper called “Procrastination and Obedience” (1991), “each morning for over eight months I woke up and decided that the next morning would be the day to send the Stiglitz box.” He was always about to send the box, but the moment to act never arrived. Akerlof, who became one of the central figures in behavioral economics, came to the realization that procrastination might be more than just a bad habit. He argued that it revealed something important about the limits of rational thinking and that it could teach useful lessons about phenomena as diverse as substance abuse and savings habits. Since his essay was published, the study of procrastination has become a significant field in academia, with philosophers, psychologists, and economists all weighing in.

Academics, who work for long periods in a self-directed fashion, may be especially prone to putting things off: surveys suggest that the vast majority of college students procrastinate, and articles in the literature of procrastination often allude to the author’s own problems with finishing the piece. (This article will be no exception.) But the academic buzz around the subject isn’t just a case of eggheads rationalizing their slothfulness. As various scholars argue in “The Thief of Time,” edited by Chrisoula Andreou and Mark D. White (Oxford; $65)—a collection of essays on procrastination, ranging from the resolutely theoretical to the surprisingly practical—the tendency raises fundamental philosophical and psychological issues. You may have thought, the last time you blew off work on a presentation to watch “How I Met Your Mother,” that you were just slacking. But from another angle you were actually engaging in a practice that illuminates the fluidity of human identity and the complicated relationship human beings have to time. Indeed, one essay, by the economist George Ainslie, a central figure in the study of procrastination, argues that dragging our heels is “as fundamental as the shape of time and could well be called the basic impulse.”

It’s also a surprisingly costly one. Each year, Americans waste hundreds of millions of dollars because they don’t file their taxes on time. The Harvard economist David Laibson has shown that American workers have forgone huge amounts of money in matching 401(k) contributions because they never got around to signing up for a retirement plan. Seventy per cent of patients suffering from glaucoma risk blindness because they don’t use their eyedrops regularly. Procrastination also inflicts major costs on businesses and governments. The recent crisis of the euro was exacerbated by the German government’s dithering, and the decline of the American auto industry, exemplified by the bankruptcy of G.M., was due in part to executives’ penchant for delaying tough decisions. (In Alex Taylor’s recent history of G.M., “Sixty to Zero,” one of the key conclusions is “Procrastination doesn’t pay.”)

Philosophers are interested in procrastination for another reason. It’s a powerful example of what the Greeks called akrasia—doing something against one’s own better judgment. Piers Steel defines procrastination as willingly deferring something even though you expect the delay to make you worse off. In other words, if you’re simply saying “Eat, drink, and be merry, for tomorrow we die,” you’re not really procrastinating. Knowingly delaying because you think that’s the most efficient use of your time doesn’t count, either. The essence of procrastination lies in not doing what you think you should be doing, a mental contortion that surely accounts for the great psychic toll the habit takes on people. This is the perplexing thing about procrastination: although it seems to involve avoiding unpleasant tasks, indulging in it generally doesn’t make people happy. In one study, sixty-five per cent of students surveyed before they started working on a term paper said they would like to avoid procrastinating: they knew both that they wouldn’t do the work on time and that the delay would make them unhappy.