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Andrew Lo: Finding the Perfect Portfolio--a ‘Never-Ending Journey’

The Long View

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The Evolution of Portfolio Theory

In one afternoon, Markowitz had worked out the two major inputs to what became modern portfolio theory correlation and the notion of mean variance optimization. Since then, he's actually spent some time thinking about other criteria, other behavioral approaches. In that respect, I think he really is the very first behavioral economist. He took human behavior seriously and then worked out the implications for helping everybody manage their particular behavioral desires.

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