Hubungan pusat dan daerah pasca desentralisasi konflik kepentingan badan pengusahaan batam dan pemerintah Kota Batam dalam pembagian kewenangan daerah Kota Batam 2007 2015 = Relations between central and local governmen after decentralization conflict interest between bifza Batam Indonesia free zone authority and Batam City government in regional authority of Batam City 2007 2015