By 1983 regular inter-family boss meetings recognized the Greco as most powerful

Evidence

As late as 1983 Stefano Calzetta and Vincenzo Sinagra—in spite of having operated in separate spheres—both refer to regular meetings between the bosses of the most important families; they identify the Greco family as the most important one of all and Michele Greco as the most powerful man in their trade (VS: I, 52, 132; SC: IV, 45, 77). — Diego Gambetta, The Sicilian Mafia The Business of…, 901

Categorization

• XREF: Regular meetings among rival-family bosses = the inter-community coordination layer that Milgrom’s model requires; corresponds to the Commission/bourse structure, not just dyadic ties.