When I wrote about David Frum's voodoo criminology in support of the death penalty, I didn't mention any of the recent research that purports to find a deterrent effect for the death penalty because Frum didn't cite it. That research has always seemed suspect to me -- since a very small fraction of murderers are executed in America, it seems unlikely that any effect could be detected above the noise of all the other factors that affect the crime rate. Now a paper by Donohue and Wolfers has been published that is absolutely devastating to the papers that found deterrence. Donohue and Wolfers reanalyze the data used in those papers and found that the deterrence effect goes away if you look at it sideways. For example, one of the most recently touted papers found that each execution deterred 18 murders. However, the description of the model used in that paper was slightly inaccurate. When D&W followed that description the result was that each execution caused 18 murders. Since we don't know which model is the correct one, the data just does not tell whether the death penalty deters or not. Similar problems occur with the other papers that found an effect.
Also on the death penalty: Steve Levitt catches Paul Rubin misrepresenting Levitt's research on the death penalty in Senate testimony.
Deltoid
Tim Lambert's weblog
Search this blog
Search older postings
Profile
Tim Lambert (deltoidblog AT gmail.com) is a computer scientist at the University of New South Wales.
Recent Posts
- The Australian's War on Science XXIV
- Silenced Plimer somehow appears on TV, on radio, in newspapers. A lot.
- Move over, Gregg Easterbrook
- The Iraq war - A humanitarian disaster
- Deaths in Iraq
- Violent war deaths: Surveys vs passive surveillance
- Quadrant's war on science
- More on Booker
- Open Thread 15
- Mountains out of molehills
Recent Comments
- Sock Puppet of the Great Satan on The Australian's War on Science XXIV
- Dano on The Australian's War on Science XXIV
- bi -- IJI on The Australian's War on Science XXIV
- Bobclip on The Australian's War on Science XXIV
- P. Lewis on The Iraq war - A humanitarian disaster
- pauly on The Iraq war - A humanitarian disaster
- bi -- IJI on Monckton has a gold Nobel prize pin
- Barton Paul Levenson on The Australian's War on Science XXIV
- trane on Monckton has a gold Nobel prize pin
- Jeff Harvey on Deaths in Iraq
Categories
- Ask a ScienceBlogger
- Brignell
- DDT
- Fumento
- Global Warming
- Gregg Easterbrook is an idiot
- Iraq
- LancetIraq
- Lott
- Milloy
- Open Thread
- Skeptics Circle
- The War on Science
- astroturf
- criminology
- funny
- graphics
- guns
- meet up
- meta
- personal
- politics
- random
- statistics
- stupidity
Archives
- November 2008
- October 2008
- September 2008
- August 2008
- July 2008
- June 2008
- May 2008
- April 2008
- March 2008
- February 2008
- January 2008
- December 2007
- November 2007
- October 2007
- September 2007
- August 2007
- July 2007
- June 2007
- May 2007
- April 2007
- March 2007
- February 2007
- January 2007
- December 2006
- November 2006
- October 2006
- September 2006
- August 2006
- July 2006
- June 2006
- May 2006
- April 2006
- March 2006
- February 2006
- January 2006
Links
Blogroll
- Angry Bear
- Backseat driving
- BARISTA
- Blogocracy
- Brad Delong
- Brave New Climate
- Bug Girls' Blog
- Cliopatria
- Club Troppo
- Crooked Timber
- David Friedman
- Econospeak
- Eschaton
- Fafblog
- Freakonomics blog
- Gristmill
- Groklaw
- Hot Topic
- Hit and Run
- James' Empty Blog
- John Quiggin
- Jon Swift
- JustOneMinute
- Larvatus Prodeo
- Making Light
- Millard Fillmore’s Bathtub
- More Grumbine Science
- Nexus 6
- Notes from the Lounge
- Oliver Willis
- Only In It For The Gold
- Political Animal
- Rabett Run
- RealClimate
- Road to Surfdom
- Sadly, No!
- TBogg
- The Panda's Thumb
- The Poor Man
- The Reality-based Community
- The Volokh Conspiracy
- Think Progress
- TPM Cafe
- Unqualified Offerings
- AMK's Journal
- Andrew Leigh
- Andrew Norton
- Antony Loewenstein
- ArchPundit
- are you effin' kidding me?
- B and B
- Brian Linse
- Carnaby Fudge
- Climate Progress
- DeSmogBlog
- Detached Observer
- eRiposte
- Explananda
- Flop Eared Mule
- From a LAN Downunder
- Hoyden About Town
- Infothought
- John Fleck
- The Hard Sell
- Known Unknowns
- Long Ago and Not True Anyway
- Matt T
- Malaria Matters
- Mobjectivist
- Morgspace
- Notional Slurry
- ObservatioNZ
- Palmer's Oz Politics
- Public Nuisance
- Rhosgobel: Radagast's home
- Say Uncle
- Section 15
- short notes: will brady's ruminations
- Skeptics' Circle
- skippy the bush kangaroo
- Some are Boojums
- Speedkill
- spiceblog
- Stephen Gloor
- stoush.net
- The Bartlett Diaries
- The Ethical Werewolf
- The Huffington Post
- The Myron Ebell Climate
- The Pigs are Flying
- The Post-Normal Times
- The Virtual Stoa
- This Space For Rent
- Total Information Awareness
- Tug Boat Potemkin
- Wis[s]e Words
Archives of previous Deltoid
- science
- personal
- meta
- politics
- LancetIraq
- reviews
- surveys
- world
- Fumento
- computers
- guns
- Lott
- maths
- bingo
Subscribe via Email
Stay abreast of your favorite bloggers' latest and greatest via e-mail, via a daily digest.
« Koufax voting | Main | Why you should study statistics »
Death Penalty
Category: criminology
Posted on: March 6, 2006 12:33 PM, by Tim Lambert
Comments
It's not even entirely clear to me why anyone would prefer life in prison to death. And if that preference did exist, would it really be sufficient to make the difference?
Posted by: David Roberts | March 6, 2006 5:42 PM
"I didn't mention any of the recent research that purports to find a deterrent effect for the death penalty because Frum didn't cite it."
What a very odd thing to say. Frum wrote: "So rare a punishment cannot qualify as a deterrent." Which you clearly agree with, since you echo his point.
Oh, any chance of a correction on that earlier post, by the way? Or at least a clarification? You know, about the UK crime survey you claim proves a decline in all crime despite not including rape, murder, crimes against kids, drug dealing, and so on?
Posted by: tim | March 6, 2006 8:26 PM
The question of death penalty is like abortion, it's an ideological question and studies like that are pretty irrelevant.
Posted by: Roman Werpachowski | March 6, 2006 9:16 PM
speaking of odd things to say, frum's comment itself is odd, given two paragraphs later he says:
"If societies want to wind back crime, however, they need to begin by sending a clear message that the sheriff is back in town - that crime won't be tolerated and will be punished to the full extent of the law. And nothing broadcasts that message like restoration of the most extreme punishment."
i may not be an esteemed editor of the bulletin, but that sounds to me an awful lot like saying "the death penalty is a deterrent", only not saying it in those words. it's almost as if frum knows he won't be taken seriously if he explicitly says "the death penalty is a deterrent", but wants to make the point regardless. now why would he do that?*
(*aside from his being a dishonest hack.)
Posted by: snuh | March 6, 2006 10:20 PM
"And nothing broadcasts that message like restoration of the most extreme punishment."
One could justify nastier things then just lethal injection, this way.
Posted by: Roman Werpachowski | March 6, 2006 10:36 PM
The question of death penalty is like abortion, it's an ideological question and studies like that are pretty irrelevant.I'll second that.
Posted by: Ben | March 7, 2006 1:18 AM
You know, about the UK crime survey you claim proves a decline in all crime despite not including rape, murder, crimes against kids, drug dealing, and so on
presuming that you are talking about the British Crime Survey, it does include sexual offences and homicides. Since it is a victim survey and nobody is a "victim" of drug dealing, it does not specifically ask about drugs offences, but it does contain a question about whether people perceive that there is a high incidence of drug dealing in their area. Crimes against under-16s are covered in a separate survey (the Offending, Crime and Justice Survey) and although there are issues with comparability, the trend is also down.
Are you really interested in the numbers? I don't think so.
Posted by: dsquared | March 7, 2006 4:21 AM
"The question of death penalty is like abortion, it's an ideological question and studies like that are pretty irrelevant."
That depends. Yes, it's a moral issue: death penalty will still be wrong even if it's effective in reducing crime/improving the economy/getting the "right" people elected/whatever. Same with abortion, I say. But that doesn't mean studies are worthless. For instance, a recent study in Norway found that a large percentage of women having abortions felt that their boyfriend forced them. That's important both to proponents (because they'd better think of something to do about it!) and opponents (because it illustrates nicely that legality affects what people can be forced to do - the same reason slavery is illegal, and legalized prostitution is problematic).
Posted by: Harald Korneliussen | March 7, 2006 5:34 AM
In my layman's experience, criminology experts going back to the dawn of modern criminology with the French Revolution, child-raising experts, and dog training experts almost all come to the same conclusion: unwanted behaviors are extinguished by the inevitability of detection and the speed of detection; the severity of punishment has a much less potent effect and lapses in the first two can't be made up by increasing severity.
The murderer isn't juggling whether it's worth risking the death penalty or life in prison if he gets caught; he's juggling the chances of getting away with it completely.
Posted by: z | March 7, 2006 10:05 AM
The matters would be clearer if we asked the right question: "is death penalty a stronger deterrent than life imprisonment?" instead of "is death penalty a deterrent?". All punishment deterrs.
Posted by: Roman Werpachowski | March 7, 2006 4:33 PM
Tim You might also find some interesting material in this submission by Columbia University's Professor Jeffrey Fagan to the New York State Assembly Standing Committee hearings on the future of capital punishment in the State of New York.
Posted by: Ken Parish | March 8, 2006 7:33 AM
Z, I remember coming across that, as well. The joke is that, if a small number of executions for a small proportion of illegal killings causes signficant cahnges in overall crime rates, criminals are not exhibiting economically rational behavior.
Posted by: Barry | March 8, 2006 5:52 PM
Tim, the link to the study doesn't work for me - could you check if it is correct? (alternative, could you send it to me? public@kristjanwager.dk)
Posted by: Kristjan Wager | March 28, 2006 9:40 AM
The URL changed on me. I have repaired the link.
Posted by: Tim Lambert | March 28, 2006 10:36 AM
Thanks
Posted by: Kristjan Wager | March 28, 2006 10:51 AM