Mr. ALEX TABARROK (Professor, Economics, George Mason University): It's technology, computers and robots, which have raised the wages of high skilled workers and pushed down the wages of low skilled workers.

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One-dimensional, repetitive work is exactly what computers, robots and other machines are best at--and what human workers are poorly suited to and almost uniformly despise.

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Robots and computers will not change bed sheets and diapers.

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We went through a lab -- they had robots, they had computers with vectors and this and that.

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Scientists foresee a day when they can churn out virus-size computers, cancer-munching robots swimming through arteries and desktop factories assembling watches out of dust.

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The long-term goal is to build robots that will make people more productive at home and at work, just as personal computers do today, Wyrobek says.

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Every night, when the humans are tucked up in bed, the robots are collected by truck to be cleaned and repaired in huge labs populated by giant computers and white coated and masked technicians.

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