 Sibe awon elomiran ti fi han pe ijoba-okeere je iyato nikan nigbati ko ni awon igbese ti o se atileyin fun awon oselu oloselu lati dije awon agbegbe agbegbe.Wo eleyi na  Consociationalism Cooperative federalism Democratic World Federalists Federal Union Forum of Federations Layer cake federalism Pillarisation States' rights Union of Utrecht World Federalist MovementExternal links  P.-J.. 
O pese alaye ati atilẹyin fun awọn aṣikiri nipasẹ imọ rẹ ti ofin Iṣilọ, Faranse, European ati, ni awọn ọna kan, Ilu okeere, ati iriri ti awọn iṣe Iṣilọ.. 