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Wednesday, November 19, 2014

Washington Post More Guns Equal More Crime Blog Post Misses Important Facts

Last weekend, Christopher Ingraham of the Washington Post's Wonkblog had this post reporting on a September piece by Stanford law professor John Donohue and his colleagues that purports to discredit Dr. John Lott's work More Guns Less Crime. That in and of itself is not new. A number of anti-rights academics have sought to show Lott's work is flawed since it was first published.  According to Wonk Blog, Donohue has added another decade of data to support their thesis:
Now, Stanford law professor John Donohue and his colleagues have added another full decade to the analysis, extending it through 2010, and have concluded that the opposite of Lott and Mustard's original conclusion is true: more guns equal more crime.

"The totality of the evidence based on educated judgments about the best statistical models suggests that right-to-carry laws are associated with substantially higher rates" of aggravated assault, robbery, rape and murder, Donohue said in an interview with the Stanford Report. The evidence suggests that right-to-carry laws are associated with an 8 percent increase in the incidence of aggravated assault, according to Donohue. He says this number is likely a floor, and that some statistical methods show an increase of 33 percent in aggravated assaults involving a firearm after the passage of right-to-carry laws.
On Sunday, Lott's Crime Prevention Research Center had a post pointing out where Ingraham is wrong. The post notes that Lott had already used the additional data in his most recent updated edition of More Guns Less Crime:
There are many errors in Ingraham’s article.  For example, “Stanford law professor John Donohue and his colleagues have added another full decade to the analysis.”  Yet, the third edition of “More Guns, Less Crime” has data from 1977 to 2005.  Moody, Marvell, Zimmerman, and Alemante have a new paper earlier this year that looked at data from 1977 to 2006.  Gius (2014) looked at data up through 2009.  Zimmerman (2014) looks at crime data up through 2010.   Previously even in the Washington Post, Emily Badger’s misleading column also discussed an earlier version of Donohue’s paper with data through 2006 (7/29).
And, CPRC even used a graph from the 3rd Edition of More Guns Less Crime that uses the very data that Donohue says should be used, the way they say it should be used.

So you tell me, do more guns equal more crime?

2 comments:

BHirsh said...

The term "educated judgment" betrays the study's credibility.

Unknown said...

The Washington comPost has never let actual facts get in the way of their extreme leftist agenda. The WaPo is nothing more now than an over-rated supermarket tabloid of little to no credibility.