悬赏 1 个论坛币 已解决
【作者(必填)】Kristian Behrens;Gilles Duranton;Frédéric Robert-Nicoud
【文题(必填)】Productive Cities: Sorting, Selection, and Agglomeration
【年份(必填)】2014,Jun 122, 3, 507-553
【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.1086/675534?uid=3737800&uid=2&uid=4&sid=21104360519013