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The way that takes place, at least in some economies,
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is you start seeing qualification inflation.
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By qualification inflation I mean that, pretty soon,
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even to drive a dump truck you need to have a university degree.
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Okay, now what are the lessons here for education more generally?
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This is a pretty sparse model of education
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but all of you, and more immediately me,
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are involved in the education system.
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So we should care about it a bit.
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It's probably the most famous model of education.
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As I say, it won somebody the Nobel Prize.
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What is it telling us about education?