But few studies have established that less education is actually a cause of crime.

但是，并没有任何一份研究表明没文化是犯罪的根源。

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And studies show that contented humans live longer than miserable ones, and are less inclined to turn to crime and much more likely to form relationships.

而且研究表明那些过得如意的人比不如意的人更长寿，犯罪机率更低，社会关系更稳定。

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The study was paid for by Britain's Centre for Crime and Justice Studies and was published online Monday in the medical journal, Lancet.

该研究由英国犯罪与司法研究中心出资，并于上周一在线发表在医学杂志《柳叶刀》上。

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The study was funded by the London-based Centre for Crime and Justice studies.

CNN: STORY HIGHLIGHTS

Oliver, a sociologist who studies crime at the University of Wisconsin, Madison, says it isn't clear how to combine data from prison surveys and from national surveys that exclude prisoners.

WSJ: Why Surveys Should Listen More to Prisoners

Last year, a report by the independent Centre for Crime and Justice Studies said spending on overtime in England and Wales had increased by 90% since 1998 despite a record rise in the number of officers.

BBC: Police pay cuts 'unavoidable' says home secretary