CONCEPT
Maghribi Traders
The eleventh-century Mediterranean trading coalition whose informal reputation-based institution enabled long-distance commerce without formal legal enforcement — the canonical case for how norms substitute for rules when formal infrastructure is absent.
The Maghribi traders of the eleventh-century Mediterranean maintained a trading network spanning thousands of miles without the benefit of formal legal systems capable of enforcing contracts across jurisdictions. They relied instead on an informal institution: a coalition in which members shared information about the conduct of their trading agents, and in which the sanction for cheating was exclusion from the coalition — a penalty that, given the coalition's commercial dominance, was economically devastating. Avner Greif's research made the Maghribi case a canonical illustration of how informal norms can function as effective institutions when formal enforcement is unavailable. North drew on the case extensively to demonstrate that institutional frameworks are not limited to formal legal arrangements and that the quality of informal institutional infrastructure is a primary determinant of whether productive exchange occurs.
In The You On AI Field Guide
The Maghribi traders were Jewish merchants based in North Africa and the eastern Mediterranean during the tenth through twelfth centuries. They coordinated long-distance trade across