John Lott of the University of Maryland argues that short-term fluctuations in the crime rate are fairly idiosyncratic, and that trends should be observed over a longer period.

马里兰大学的约翰·洛特认为短期内犯罪率的浮动有一定特殊性，而想掌握犯罪趋势则应通过长期的观察。

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University of Chicago economist John Lott is the most well-known researcher on the issue.

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Or as economist John Lott has emphasized, Obamanomics has produced the worst recovery since the Great Depression.

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Economist, John Lott, wrote the most comprehensive book on the effects of gun control, More Guns, Less Crime.

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