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The Product Space uses international trade data from Feenstra, Lipset, Deng, Ma, and Mo's World Trade Flows: 1962-2000 dataset, cleaned and made compatible through a National Bureau of Economic Research (NBER) project. The dataset contains exports and imports both by country of origin and by destination. Products are disaggregated according to the Standardized International Trade Code at the four-digit level (SITC-4). Focusing on data from 1998-2000 yields 775 product classes and provides for each country the value exported to all other countries for each class. From this, a 775-by-775 matrix of proximities between every pair of products is created.A. The Product Space matrix sorted by SITC4 classification. B. The Product Space hierarchically sorted reveals modularity and that 775 products are actively traded.
The Product Space uses international trade data from Feenstra, Lipset, Deng, Ma, and Mo's World Trade Flows: 1962-2000 dataset, cleaned and made compatible through a National Bureau of Economic Research (NBER) project. The dataset contains exports and imports both by country of origin and by destination. Products are disaggregated according to the Standardized International Trade Code at the four-digit level (SITC-4). Focusing on data from 1998-2000 yields 775 product classes and provides for each country the value exported to all other countries for each class. From this, a 775-by-775 matrix of proximities between every pair of products is created.A. The Product Space matrix sorted by SITC4 classification. B. The Product Space hierarchically sorted reveals modularity and that 775 products are actively traded.
产品空间使用来自 Feenstra、 Lipset、 Deng、 Ma 和 Mo 的世界贸易流动: 1962-2000数据集的国际贸易数据，通过国家经济研究局(NBER)项目进行了清理和兼容。数据集包含了起源国和目的地的导出和导入。产品按照《标准化国际贸易守则》的四位数分类(SITC-4)。以1998-2000年的数据为重点，得出了775个产品类别，并为每个国家提供了每个类别向所有其他国家出口的价值。由此，得到了每对产品之间的775 * 775的相似度矩阵。按 SITC4分类排序的乘积空间矩阵。乙。产品空间按层次分类揭示了模块性，775种产品被积极交易。
产品空间使用来自 Feenstra、 Lipset、 Deng、 Ma 和 Mo 的世界贸易流动: 1962-2000数据集的国际贸易数据，通过'''<font color="#ff8000">国家经济研究局 National Bureau of Economic Research</font>'''(NBER)项目进行了清理和兼容。数据集包含了起源国和目的地的导出和导入。产品按照《标准化国际贸易守则》的四位数分类(SITC-4)。以1998-2000年的数据为重点，得出了775个产品类别，并为每个国家提供了每个类别向所有其他国家出口的价值。由此，得到了每对产品之间的775 * 775的相似度矩阵。A.按 SITC4分类排序的乘积空间矩阵。B.产品空间按层次分类揭示了模块性，775种产品被积极交易。
===Matrix representation===
===Matrix representation===