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第52行： − 麻省理工学院的物理学家 c sar Hidalgo 和哈佛大学的经济学家 Ricardo Hausmann 介绍了一种谱方法，通过从连接国家和出口产品的网络结构推断出一个国家经济的复杂性。这项措施将一个国家的多样性信息与一个国家的生产性知识正相关的信息与产品普遍性(生产或出口产品的国家数目)的措施结合起来。这一概念被称为“产品空间” ，麻省理工学院的经济复杂性观察站和2011年的《经济复杂性地图集》进一步发展了这一概念。+ − − 第67行：
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→经济复杂性指数 Economic complexity index
MIT physicist César Hidalgo and Harvard economist Ricardo Hausmann introduced a spectral method to measure the complexity of a country's economy by inferring it from the structure of the network connecting countries to the products that they export. The measure combines information of a country's diversity, which is positively correlated with a country's productive knowledge, with measures of a product ubiquity (number of countries that produce or export the product). This concept, known as the "Product Space", has been further developed by MIT's Observatory of Economic Complexity, and in The Atlas of Economic Complexity in 2011.
MIT physicist César Hidalgo and Harvard economist Ricardo Hausmann introduced a spectral method to measure the complexity of a country's economy by inferring it from the structure of the network connecting countries to the products that they export. The measure combines information of a country's diversity, which is positively correlated with a country's productive knowledge, with measures of a product ubiquity (number of countries that produce or export the product). This concept, known as the "Product Space", has been further developed by MIT's Observatory of Economic Complexity, and in The Atlas of Economic Complexity in 2011.
麻省理工学院物理学家塞萨尔·伊达尔戈（César Hidalgo）和哈佛大学经济学家里卡多·豪斯曼（Ricardo Hausmann）介绍了一种谱方法，通过各国与出口产品之间的网络结构推断出一个国家经济的复杂性。该指标将与一国生产知识正相关的国家多样性信息与产品普遍性（生产或出口该产品的国家数量）的指标相结合。这个被称为“产品空间”的概念被麻省理工学院的经济复杂性观察站进一步发展，并在2011年的《经济复杂性地图集》中得到了进一步的发展。
经济复杂性指数(ECI)是由 Hidalgo 和 Hausmann 提出的
经济复杂性指数(ECI)是由 Hidalgo 和 Hausmann 提出的
=== 国家健康状况和产品复杂性指标 Metrics for country fitness and product complexity ===
=== 国家健康状况和产品复杂性指标 Metrics for country fitness and product complexity ===