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. 2018 Feb 6;5:180004. doi: 10.1038/sdata.2018.4

Table 2. List of input data for GDP per capita (PPP) and GDP (PPP) datasets.

Dataset Description Source Notes
Sub-national GDP per capita (PPP) Spatial resolution: sub-national (i.e., province, state, etc.; depending on country in question)Temporal resolution: annual data for 1960–2010; country specific coverageUnit: constant 2005 international USD Gennaioli, et al.28 See Gennaioli, et al.28 for more details about the countries included and temporal coverage within each country. See also pedigree data for GDP and Fig. 5.
National GDP per capita (PPP) Spatial resolution: nationalTemporal resolution: annual data for 1990–2015, country-specific coverage but mostly data for each year is availableUnit: constant 2011 international USD World Bank32 See World Bank32 for more details about the countries included and temporal coverage within each country. See also pedigree data for GDP and Fig. 5.
National GDP per capita (PPP) for small island nations Spatial resolution: nationalTemporal resolution: only individual year or few years of dataUnit: constant 2015 international USD1 CIA33 World Bank dataset did not include data for all countries and thus, those were extracted from CIA33 and listed in Supplementary Information.
Population count (5 arc-min) Spatial resolution: 5 arc-minTemporal resolution: 1990, 2000–2015.Unit: population per grid cell HYDE 3.2 7 Population dataset was used to calculate GDP (PPP) from GDP per capita (PPP). The years not available (1991–1999) were linearly interpolated at grid scale based on data from years 1990 and 2000.
Population count (30 arc-sec) Spatial resolution: 30 arc-secTemporal resolution: 1990, 2000, 2015.Unit: population per grid cell Global Human Settlement (GHS)1 Population dataset was used to calculate GDP (PPP) from GDP per capita (PPP) for three years.