Global Volcano Total Economic Loss Risk Deciles is a 2.5 by 2.5 minute grid of global volcano total economic loss risks. First, subnational distributions of GDP are computed using a two-fold process. Where applicable, the proportional contribution of subnational units are determined following the methodology of Sachs et al. (2003), and these proportions are used against World Bank Devleopment Indicators to determine a GDP value for the subnational unit. Once a national GDP has been spatially stratified into the smallest adminstrative units available, it is further distributed based upon Gridded Population of the World Version 3.0 (beta) population distributions. A per capita contribution value is determined for each unit, and this value is multiplied by the population per grid cell. Once the GDP has been determined on a per grid cell basis, then the spatially variable loss rate as derived from EM-DAT historical records is used to determine the total economic loss posed to a grid cell by volcano hazards. The final surface does not present absolute values of total economic loss, but rather a relative decile (1-10) ranking of grid cells based upon the calculated economic loss risks. The dataset is a result of the collaboration among the Center for Hazards and Risk Research (CHRR), International Bank for Reconstruction and Development/The World Bank, and the Columbia University Center for International Earth Science Information Network (CIESIN).
