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related: https://academic.oup.com/restud/article-abstract/81/2/535/15... Pounds That Kill: The External Costs of Vehicle Weight Heavier vehicles are safer for their own occupants b…

here is the full paper in case anyone is interested: http://www.kellogg.northwestern.edu/faculty/jones-ben/htm/Ag...

few interesting findings: > Less active runners influence more active runners, but not the reverse. > Both men and women influence men, while only women influence other women.