怕你懒得看文章给你看一段摘要你自己推测一下吉尔伯特在克利夫兰和底特律把自己的原始资本积累了多少:We find that Mr. James has a statistically and economically significant positive effect on both the number of restaurants and other eating and drinking establishment near the stadium where he is based, and on aggregate employment at those establishments. Specifically, his presence increases the number of such establishments within one mile of the stadium by about 13%, and employment by about 23.5%. These effects are very local, in that they decay rapidly as one moves farther from the stadium.