[[File:Core-Periphery Network.png|thumb|A Network with an idealized core–periphery structure]]
'''Core peripheryCore–periphery structure''' is a [[network theory]] model.
==Models of core–periphery structures==
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==Uses in economics==
The concept ofwas centerfirst andintroduced peripheryinto waseconomics firstas introduced"centre-periphery" by [[Raúl Prebisch]] in the 1950s, but the origin of the idea could ultimately be traced back to [[Johann Heinrich von Thünen|Thünen]]'s ''Isolated State'' (1826).<ref>{{Cite journal |last1=Rama |first1=J. |last2=Hall |first2=J. |year=2021 |title=Raúl Prebisch and the evolving uses of ‘centre-periphery’in economic analysis |journal=Review of Evolutionary Political Economy |volume=2 |issue=2 |pages=315-332}}</ref> However, the qualitative notion that [[social networks]] can have a core–periphery structure has a long history in disciplines such as [[sociology]], [[international relations]] (Nemeth & Smith, 1985), and [[economics]] (Snyder & Kick, 1979). Observed trade flows and diplomatic ties among countries fit this structure. [[Paul Krugman]] (1991) suggests that when transportation costs are low enough manufacturers concentrate in a single region known as the core and other regions (the periphery) limit themselves to the supply of agricultural goods.
