[1
]Research Fellow, Dept. of Civil Environmental and Geomatic Engineering, Quantitative
and Applied Spatial Economic Research (QASER) Laboratory, Univ. College London, Chadwick
Building Gower St., London WC1E 6BT, U.K. (corresponding author).
[2
]Professor, Dept. of Civil Environmental and Geomatic Engineering, Applied Economics
and Finance at the Quantitative and Applied Spatial Economic Research (QASER) Laboratory,
Univ. College London, Chadwick Building Gower St., London WC1E 6BT, U.K.