1. Charles H. Dyson School of Applied Economics and Management and Regional Science-CRP Cornell University Ithaca, NY 14853, United States ija1@cornell.edu
2. Faculty of Economics and Business University of Indonesia Depok 16424, Indonesia jvirananda@windowslive.com
3. Faculty of Economics and Business University of Indonesia Depok 16424, Indonesia fauziestiko1@gmail.com