There's been a lot written recently about the "annuity anomaly." You know what that is. That's the idea stating the "rational man" will buy an annuity under certain, specific circumstances. That's what all those fancy academic experiments tell us. Trouble is, once you move those certain, specific circumstances off the blackboard and into the real world, people behave differently. 

Now, I know what you're thinking. You're thinking, "Oh, this is just another one of those articles about the well-documented problems with Modern Portfolio Theory." If that's what you're thinking, then this is what I say to you (in my best Nelson Muntz – he's the bully on the Simpsons – impersonation): "Ha ha!" 

Don't be fooled by my use of the term "rational man." Yes, that's an artifact from MPT. Yes, much of what has been learned from behavioral finance has shredded the concept behind that term. Ironically, though, it is that same area of study that proclaims investors should buy annuities. They don't actually use the term "rational man," but their conclusions, when compared to what happens in day-to-day living, has the imprimatur of the "rational man." It's like those behavioral professors are saying, "people behave irrationally, but in predictable ways." 

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