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中文摘要：
以产量为边权的企业-产品二分网络如实地刻画一个产业内企业与产品市场之间的关系,其中的网络社团揭示了哪些企业主要在哪些产品市场上展开竞争,是分析多产品产业市场结构一个很好的视角。在这个视角下对2000-2006年中国汽车产业展开分析,揭示了其市场结构的特点和演变规律。
英文摘要：
Firm-product bipartite network whose edge weights are the product quantities straightly describes the relations among firms and product markets.Its community structure revealing which firms mainly compete with each other in which product markets is a good perspective to analyze the market structure in a multiple products industry.This paper investigates the market structure of China automobile industry from 2000 to 2006 under the perspective and obtains some insightful findings which indicate the features and evolvement rules of it.
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