Kebijakan Keikutsertaan Daerah dalam Pengelolaan Industri Hulu Minyak dan Gas Bumi (Migas) melalui Participating Interest 10% ditinjau Berdasarkan Konsep Negara Kesejahteraan (Welfare State) = Regional Paticipation Policy in the Management of Upstreem Oil and Gas Industry Through a Participating Interest 10% Based on Welfare State Concept