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Death penalty, indispensable or not?   [Copy link] 中文

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Post time 2016-4-18 09:42:14 |Display all floors
This post was edited by ztoa789 at 2016-4-18 10:01

Death Penalty Deters Murders, Studies Say  By SEAN ALFANO AP June 11, 2007, 7:24 AM

What gets little notice, however, is a series of academic studies over the last half-dozen years that claim to settle a once hotly debated argument — whether the death penalty acts as a deterrent to murder. The analyses say yes. They count between three and 18 lives that would be saved by the execution of each convicted killer.

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"Science does really draw a conclusion. It did. There is no question about it," said Naci Mocan, an economics professor at the University of Colorado at Denver. "The conclusion is there is a deterrent effect."

A 2003 study he co-authored, and a 2006 study that re-examined the data, found that each execution results in five fewer homicides, and commuting a death sentence means five more homicides. "The results are robust, they don't really go away," he said. "I oppose the death penalty. But my results show that the death penalty (deters) — what am I going to do, hide them?"

Statistical studies like his are among a dozen papers since 2001 that capital punishment has deterrent effects. They all explore the same basic theory — if the cost of something (be it the purchase of an apple or the act of killing someone) becomes too high, people will change their behavior (forego apples or shy away from murder).
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Speeding up executions would strengthen the deterrent effect. For every 2.75 years cut from time spent on death row, one murder would be prevented, according to a 2004 study by an Emory University professor.

Some claim that the pro-deterrent studies made profound mistakes in their methodology, so their results are untrustworthy. Another critic argues that the studies wrongly count all homicides, rather than just those homicides where a conviction could bring the death penalty. And several argue that there are simply too few executions each year in the United States to make a judgment.

"We just don't have enough data to say anything," said Justin Wolfers, an economist at the Wharton School of Business who last year co-authored a sweeping critique of several studies, and said they were "flimsy" and appeared in "second-tier journals."

Several authors of the pro-deterrent reports said they welcome criticism in the interests of science, but said their work is being attacked by opponents of capital punishment for their findings, not their flaws.

"Instead of people sitting down and saying 'let's see what the data shows,' it's people sitting down and saying 'let's show this is wrong,"' said Paul Rubin, an economist and co-author of an Emory University study. "Some scientists are out seeking the truth, and some of them have a position they would like to defend."

The latest arguments replay a 1970s debate that had an impact far beyond academic circles.

Then, economist Isaac Ehrlich had also concluded that executions deterred future crimes. His 1975 report was the subject of mainstream news articles and public debate, and was cited in papers before the U.S. Supreme Court arguing for a reversal of the top U.S. court's 1972 suspension of executions. (The court, in 1976, reinstated the death penalty.)

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Post time 2016-4-18 09:44:11 |Display all floors
This post was edited by ztoa789 at 2016-4-18 09:45
dostoevskydr Post time: 2016-4-17 15:52
Arguments For And Against The Death Penalty

Anti death penalty people have 3 reasoning.

One, death penalty can't bring back the lives of victims.
Answer : death penalty is to stop the future crimes, like fine stops people from speeding. Therefore, what the families think or human right fundamentalists think doesn't matter, it is how criminals react that matters.

Two, death penalty in USA didn't stop crime.
Answer : To consider USA has death penalty is like claiming you have a car though it breaks down every 5-10 kilometers. You can almost be sure that the car will not go anywhere.

Three, Some countries have low crime rates though without death penalty.
Answer : to my knowledge, such countries are rich with good welfare. Well, one of the biggest reasons for crime is for money.

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Post time 2016-4-19 07:40:34 |Display all floors
This post was edited by ztoa789 at 2016-4-19 07:41

Seneca, are you going to deny the FACT that the death penalty in USA is like like claiming you have a car though it breaks down every 5-10 kilometers, and will not go anywhere ?

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Post time 2016-4-19 13:06:37 |Display all floors
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Post time 2016-4-19 13:14:47 |Display all floors
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Post time 2016-4-22 10:08:30 |Display all floors
seneca Post time: 2016-4-19 13:06
You assume that a person who has killed another human being will feel entitled to go on in his k ...

Huh? where did I make assumption?

Who said death penalty is to stop the same criminals to commit crimes again? if that was the case, life in prison would be good enough.

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