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This final note today, just because we don't have enough economic indicators to tell you about. Researchers over in the UK have come up with a literary misery index.

They cross referenced the word choices in 5 million books -- thank you Google digitization -- and came up with their index by comparing sad words minus happy words.

Lo and behold, bad economic times do show up in literature, but -- and this is the depressing part -- there's about a ten year lag.

So books in about five years are gonna be really depressing.

Follow Kai Ryssdal at @kairyssdal