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原文連結
論文資訊
- 類型：已發表論文
- 日期：2008
摘要
Cities have existed since the beginning of civilization and have always been intimately connected with humanity's 文化 and technological development. Much about the human and 社會 dynamics that takes place is cities is intuitively recognizable across time, space and culture; yet we still do not have a clear cut answer as to why cities exist or to what factors are critical to make them thrive or collapse. Here, we construct an extensive quantitative characterization of the variation of many 城市 indicators with city size, using large data sets for American, European and Chinese cities. We show that 社會 and 經濟 quantities, characterizing the creation of wealth and new ideas, show increasing returns to 族群 scale, which appear quantitatively as a 冪次定律 of city size with an exponent beta similar or equal
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