Prisons lower the crime rate

James Q. Wilson:

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In the last 10 years, the effect of prison on crime rates has been studied by many scholars. The Pew report doesn't mention any of them. Among them is Steven Levitt, coauthor of "Freakonomics." He and others have shown that states that sent a higher fraction of convicts to prison had lower rates of crime, even after controlling for all of the other ways (poverty, urbanization and the proportion of young men in the population) that the states differed. A high risk of punishment reduces crime. Deterrence works.

But so does putting people in prison. The typical criminal commits from 12 to 16 crimes a year (not counting drug offenses). Locking him up spares society those crimes. Several scholars have separately estimated that the increase in the size of our prison population has driven down crime rates by 25%.

The Pew writers lament the fact that this country imprisons a higher fraction of its population than any other nation in the world, including Russia. But what they ignore is what the United States gets in return for its high rate of incarceration. For instance, in 1976, Britain had a lower robbery rate than did California. But then California got tough on crime as judges began handing out more prison sentences, and Britain became soft as laws were passed encouraging judges to avoid prison sentences. As a result, the size of the state's prison population went up while Britain's went down. By 1996, Britain's robbery rate was one-quarter higher than California's. Compared with those of the U.S. overall, Britain's burglary and assault rates are twice as high, according to a comparative study done by the U.S. Bureau of Justice Statistics.

These differences in crime rates involve many countries with low imprisonment rates. The robbery rate in the U.S. is not only lower than that in Britain but also that in Australia, Canada, the Netherlands, Poland, Portugal, Scotland and Spain, according to the same study. The imprisonment rate in these countries is one-fifth to one-tenth that in the United States.

You cannot make an argument about the cost of prisons without taking into account the benefit of prisons. The Pew report makes no effort to do this. Instead, it argues that spending on prisons may be crowding out spending on education. For instance, tax dollars spent on higher education in the U.S. have increased much more slowly than those spent on corrections. The report does not ask whether the slower growth may be in part because of the sharp increase in private support for public universities, much less whether society gets as much from universities as it does from prisons.

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Liberals still seem surprised by crime falling as the prison population increases. That prisons take away the opportunity to commit crimes does not dissuade them from thinking that education could have solved the problem. Perhaps they should look at the drop out rate of those in prison and rethink that argument. The UK not only does not do a good job of putting and keeping criminals in prison, it also criminalizes resistance to crime.

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