Apparent poaching exceptions involve leadership succession, not supplier switching

Evidence

A few recorded cases seem to transgress the rule against poaching: Salvatore Montalto, for instance, was appointed reggente of the Villa bate family although he had originally belonged to the family of Passo di Rigano; Salvatore Inzerillo succeeded his uncle, Don Tano Di Maggio (who “stood aside spontaneously”), as head of the family of Passo di Rigano although he had previously been a member of the neigh boring firm of Uditore (TB: I, 85, 126; TC: 8). But these examples involve leaders rather than ordinary members, and are therefore cases of subcontracting and succession rather than change of supplier. — Diego Gambetta, The Sicilian Mafia The Business of…, 939

Categorization

• XREF: Directly parallels the ‘change of supplier’ vs ‘subcontracting’ distinction in Gambetta’s own protection-market model; also echoes Milgrom’s analysis of reputation and entry control in trade institutions.