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{{Original research|date=April 2019}}

{{Original research|date=April 2019}}

[[File:TheProductSpace.png|thumb|right|200px|upright=3|'''The Product Space''' is a network representation of the relatedness or proximity between products traded in the global market. The network exhibits heterogeneity and a core-periphery structure: the core of the network consists of metal products, machinery, and chemicals, whereas the periphery is formed by fishing, tropical, and cereal agriculture. The clusters of products in this space bear a striking resemblance to Leamer's product classification system.]]全球市场上交易的产品之间关系或接近程度的网络表示。该网络表现出异质性和核心-外围结构: 网络的核心由金属产品、机械和化学品组成，而外围则由渔业、热带和谷物农业组成。这个领域的产品集群与利默的产品分类方案有着惊人的相似之处。

[[File:TheProductSpace.png|thumb|right|200px|upright=3|'''The Product Space''' is a network representation of the relatedness or proximity between products traded in the global market. The network exhibits heterogeneity and a core-periphery structure: the core of the network consists of metal products, machinery, and chemicals, whereas the periphery is formed by fishing, tropical, and cereal agriculture. The clusters of products in this space bear a striking resemblance to Leamer's product classification system.'''产品空间'''是在全球市场上交易的产品之间关系或接近程度的网络表示。该网络表现出异质性和核心-外围结构: 网络的核心由金属产品、机械和化学品组成，而外围则由渔业、热带和谷物农业组成。这个领域的产品集群与利默的产品分类方案有着惊人的相似之处。]]

The Product Space is a network representation of the relatedness or proximity between products traded in the global market. The network exhibits heterogeneity and a core-periphery structure: the core of the network consists of metal products, machinery, and chemicals, whereas the periphery is formed by fishing, tropical, and cereal agriculture. The clusters of products in this space bear a striking resemblance to Leamer's product classification system.

The Product Space is a network representation of the relatedness or proximity between products traded in the global market. The network exhibits heterogeneity and a core-periphery structure: the core of the network consists of metal products, machinery, and chemicals, whereas the periphery is formed by fishing, tropical, and cereal agriculture. The clusters of products in this space bear a striking resemblance to Leamer's product classification system.