英文标题：
《Colombian export capabilities: building the firms-products network》
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作者：
Matteo Bruno, Fabio Saracco, Tiziano Squartini, Marco Due\\~nas
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最新提交年份：
2018
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英文摘要：
  In this paper we analyse the bipartite Colombian firms-products network, throughout a period of five years, from 2010 to 2014. Our analysis depicts a strongly modular system, with several groups of firms specializing in the export of specific categories of products. These clusters have been detected by running the bipartite variant of the traditional modularity maximization, revealing a bi-modular structure. Interestingly, this finding is refined by applying a recently-proposed algorithm for projecting bipartite networks on the layer of interest and, then, running the Louvain algorithm on the resulting monopartite representations. Important structural differences emerge upon comparing the Colombian firms-products network with the World Trade Web, in particular, the bipartite representation of the latter is not characterized by a similar block-structure, as the modularity maximization fails in revealing (bipartite) nodes clusters. This points out that economic systems behave differently at different scales: while countries tend to diversify their production --potentially exporting a large number of different products-- firms specialize in exporting (substantially very limited) baskets of basically homogeneous products.
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中文摘要：
在本文中，我们分析了2010年至2014年五年期间的哥伦比亚双方公司产品网络。我们的分析描述了一个强大的模块化系统，由几组专门从事特定类别产品出口的公司组成。通过运行传统模块化最大化的二部变体来检测这些集群，揭示了一种双模块结构。有趣的是，这一发现通过应用最近提出的算法在感兴趣的层上投影二部网络，然后在得到的单部表示上运行Louvain算法来改进。在将哥伦比亚公司产品网络与世界贸易网进行比较时，出现了重要的结构差异，特别是后者的二分表示没有类似的块结构，因为模块化最大化无法揭示（二分）节点集群。这表明，经济体系在不同的规模上表现不同：虽然各国倾向于生产多样化，可能出口大量不同的产品，但企业专门出口（数量非常有限）一篮子基本同质的产品。
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分类信息：

一级分类：Physics        物理学
二级分类：Physics and Society        物理学与社会
分类描述：Structure, dynamics and collective behavior of societies and groups (human or otherwise). Quantitative analysis of social networks and other complex networks. Physics and engineering of infrastructure and systems of broad societal impact (e.g., energy grids, transportation networks).
社会和团体（人类或其他）的结构、动态和集体行为。社会网络和其他复杂网络的定量分析。具有广泛社会影响的基础设施和系统（如能源网、运输网络）的物理和工程。
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一级分类：Quantitative Finance        数量金融学
二级分类：General Finance        一般财务
分类描述：Development of general quantitative methodologies with applications in finance
通用定量方法的发展及其在金融中的应用
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