Interesting post by Kevin Drum:
Earlier this morning I mentioned the Brennan Center’s new report on the decline in crime over the past two decades, and one of its prime focuses is on incarceration. One of the authors of the report explains at 538 what they found. Basically, it turns out that locking up more people does have a deterrent effect, but that effect plummets when you start locking up people at huge rates—as we’ve done:
It’s because of these elevated levels that we’re likely to see diminishing returns. If we assume — fairly! — that the criminal justice system tends to incarcerate the worst offenders first, it becomes clear why. Once the worst offenders are in prison, each additional prisoner will yield less benefit in the form of reduced crime. Increased incarceration — and its incapacitation effect — loses its bite.
….And diminishing returns are what we saw…
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