Word: costes
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...mobile carriers to provide this wildly popular service. SMS messages are not only extremely short (maxing out at 160 characters), but they also cleverly exploit today's digital phone networks, leveraging transmission channels between phone and cell tower that were originally designed to coordinate voice calls. "They cost the mobile carriers so little that you could argue that they're free," says Collins...
...Srinivasan Keshav, a professor at the University of Waterloo in Ontario and an expert on mobile computing, presented a detailed analysis of all the expenses that carriers incur in handling SMS messages. He showed that the wireless channels contribute about a tenth of a cent to a carrier's cost, that accounting charges might be twice that and that other costs basically round to zero because texting requires so little of a mobile network's infrastructure. Summing up, Keshav found that a text message doesn't cost providers more than 0.3 cent. (Read "When Fingers Do the Flirting...
...have to be a Wall Street analyst to do the quick math: with a carrier cost of one-third of a penny, when a customer pays 15 cents to send a message, 98% of that 15 cents is pure profit. (Of course, you already knew that in your gut; that's why your stomach turns every time you examine your cell-phone bill...
...Cost analyses will stay flexible because SMS isn't constrained by capacity, says Collins. He draws an analogy to amusement parks: "Once you build the park (or wireless network), the marginal cost of each customer (or text message) is minimal...
...many sports cardiologists think that's a bad idea. The American Heart Association (AHA), while agreeing with the need for a screening program, believes that universal ECG tests are not cost-effective and are also likely to result in unacceptably high rates of false-positive results. It recommends that athletes instead be screened through a health questionnaire and physical examination, with an ECG used only as a secondary investigation. "Our current position on screening young people before athletic competition calls for a thorough patient and family medical history and a physical exam as the first line of screening...