SUMMARY OF CONTEXTUAL VARIABLES IN IPUMS-DHS
| Variable | Description | Source | Temporal resolution | Spatial resolution (circa km) of source data |
Variable type | Buffer (Km) |
|---|---|---|---|---|---|---|
| Physical and Environmental Context | ||||||
| ECOREGION | Predominant terrestrial ecoregion | Terrestrial Ecoregion of the World (TEOW) | NA | NA | Categorical | 5 |
| SOIL | Soil type | SoilGrids, World Soil Information (ISRIC) | NA | .25 | Categorical | 5 |
| NDVI1 | Greenness of vegetation and land cover in area | The Moderate Resolution Imaging Spectroradiometer (MODIS) | 60 months prior to survey start month, survey start month, and 11 months after survey start month; total 72 months1 | .25 | Numeric (0 to 1) |
10 |
| PRECIP2 | Average monthly precipitation (millimeters) |
Climate Hazards Group (CHG) from InfraRed Precipitation with Station data (CHIRPS) | 60 months prior to survey start month, survey start month, and 11 months after survey start month; total 72 months2 | 5 | Numeric | 10 |
| TEMP_MIN3 TEMP_MAX |
Minimum and maximum monthly temperature (kelvin scale) | Terrestrial Hydrology Research Group, Princeton University (version 3) | 60 months prior to survey start month, survey start month, and 11 months after survey start month; total 72 months3 | 25 | Numeric | 10 |
| Economic and Social Context | ||||||
| LIVELIHOOD4 | Predominant livelihood zone (i.e., main economic basis for subsistence) | Famine Early Warning System Network (FEWS NET) | NA | NA | Categorical | 5 |
| POPDENSITY | Population density (persons per square kilometer) | Gridded Population of the World (GPW), v4, from Socioeconomic Data and Applications Center (SEDAC) | Estimates for 2000, 2005, 2010, 2015, 2020 | 1 | Numeric | 5 |
| MALARIA | Mean clinical Plasmodium falciparium malaria incidence (expressed as fractions of cases per person) | The Malaria Atlas Project (MAP) | Yearly data from 2000 - 2019 | 5 | Numeric (0 to 1) |
10 |
| Agricultural Context | ||||||
| CROPLAND | Proportion of land used for planting crops | EarthStat | Circa 2000 | 10 | Numeric (0 to 1) |
10 |
| PASTURELAND | Proportion of land used as pasture | EarthStat | Circa 2000 | 10 | Numeric (0 to 1) |
10 |
| Crops: Harvested Area (e.g., RICE_H) | Total harvested area in hectares on a subset of 17 major crops. | EarthStat | 2000 | 10 | Numeric | 10 |
| Crops: Production (e.g., RICE_P) | Total production of a specific crop, in metric tons on a subset of 17 major crops. | EarthStat | 2000 | 10 | Numeric | 10 |
- NDVI data range from February 2000 - October 2018
- PRECIPITATION data range from January 1981 - December 2020
- TEMPERATURE data ranges from January 1980 - December 2016
- LIVELIHOOD ZONE data available for the following countries: Afghanistan, Angola, Burkina Faso, Burundi, Central African Republic, Chad, Democratic Republic of the Congo, Djibouti, El Salvador, Ethiopia, Guatemala, Guinea, Haiti, Honduras, Kenya, Lesotho, Liberia, Madagascar, Malawi, Mali, Mauritania, Mozambique, Nicaragua, Niger, Nigeria, Rwanda, Senegal, Sierra Leone, Somalia, South Sudan, Sudan, Tajikistan, Tanzania, Uganda, Yemen, Zambia, Zimbabwe
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