Dept. of How Stupid of Me Not to Have Thought of That Before
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John Tierney of the NYT blogs about an academic conference on the drop in crime, but I just came up with a theory I've never heard before (although somebody must have articulated it before me):

What device that spread throughout society in the 1990s made it radically easier for witnesses to report street crimes to the cops while they were happening, thus discouraging young people from making a career of being a street criminal?

Right: the cell phone.

[Cross-posted at]

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