英文标题：
《Identifying the community structure of the international food-trade
  multi network》
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作者：
Sofia Torreggiani, Giuseppe Mangioni, Michael J. Puma, Giorgio Fagiolo
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最新提交年份：
2017
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英文摘要：
  Achieving international food security requires improved understanding of how international trade networks connect countries around the world through the import-export flows of food commodities. The properties of food trade networks are still poorly documented, especially from a multi-network perspective. In particular, nothing is known about the community structure of food networks, which is key to understanding how major disruptions or \'shocks\' would impact the global food system. Here we find that the individual layers of this network have densely connected trading groups, a consistent characteristic over the period 2001 to 2011. We also fit econometric models to identify social, economic and geographic factors explaining the probability that any two countries are co-present in the same community. Our estimates indicate that the probability of country pairs belonging to the same food trade community depends more on geopolitical and economic factors -- such as geographical proximity and trade agreements co-membership -- than on country economic size and/or income. This is in sharp contrast with what we know about bilateral-trade determinants and suggests that food country communities behave in ways that can be very different from their non-food counterparts.
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中文摘要：
实现国际粮食安全需要更好地了解国际贸易网络如何通过粮食商品的进出口流动将世界各国联系起来。食品贸易网络的性质仍然缺乏记录，尤其是从多网络的角度。特别是，对粮食网络的社区结构一无所知，这是了解重大破坏或“冲击”将如何影响全球粮食系统的关键。在这里，我们发现该网络的各个层次都有紧密联系的交易群体，这在2001年至2011年期间是一个一致的特征。我们还拟合了经济计量模型，以确定社会、经济和地理因素，解释任何两个国家共同存在于同一社区的可能性。我们的估计表明，国家对属于同一粮食贸易共同体的可能性更多地取决于地缘政治和经济因素，如地理位置接近和贸易协定共同成员，而不是国家经济规模和/或收入。这与我们所知的双边贸易决定因素形成鲜明对比，表明粮食国家社区的行为方式可能与非粮食国家社区的行为方式截然不同。
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分类信息：

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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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：Economics        经济学
分类描述：q-fin.EC is an alias for econ.GN. Economics, including micro and macro economics, international economics, theory of the firm, labor economics, and other economic topics outside finance
q-fin.ec是econ.gn的别名。经济学，包括微观和宏观经济学、国际经济学、企业理论、劳动经济学和其他金融以外的经济专题
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