1. Social System Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
2. Kyoto University, Graduate School of Engineering, Nishikyoku, Kyoto 615-8540, Japan
3. Public Systems Group, Indian Institute of Management Ahmedabad Vastrapur, Ahmedabad, Gujarat 380015, India