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附2 幂率分布基本概念

Course video 64 of 82

本章从个体决策依赖于他人的选择这一出发点,研究整个群体的聚合效应。首先通过构建一个信息级联的简单通用模型,利用贝叶斯公式推理和分析信息级联现象,并揭示人们的从众行为尽管常常是下意识的,但也有一定的理性分析基础。进一步讨论事物的流行性分布问题,通过实际数据测量的方法展示流行度分布呈幂律分布,通过构建一个创建网页的模型,揭示了“富者更富”是这种幂律分布的成因。幂律、长尾、Zipf定律是大数据展现出来的与流行性相关的几个概念,课程采用一种市场的视角,展示了一条将它们串起来的线索,并展示了利用幂律分布函数计算产品销量的基本方法。

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