Samsul Arifin Universitas Sultan Ageng Tirtayasa   Sindangsari, Kec. Pabuaran Serang, Banten 42163 Indonesia   samsularifin@untirta.ac.id   www.untirta.ac.id           JEL Areas: O4 : Economic Growth and Aggregate Productivity: General R1 : General Regional Economics (includes Regional Data)