Setup.A BenMAP Setup encapsulates all of the data needed to run analyses for a particular
geographic area - a city, an entire country, etc. These data consist of grid definitions, pollutants,
monitor data, incidence and prevalence rates, population data, health impact functions, variables,
inflation rates, and valuation functions.
Shapefile.A shapefile is a particular type of Geographic Information System (GIS) file, and has
a .shp extension. These files are accompanied by companion files with .shx and .dbf extensions,
and can be used to create Shapefile Grid Definitions. Seehttp://www.esri.com/library/
whitepapers/pdfs/shapefile.pdffor more information.
Subjective Weighting Pooling.Subjective weights let you specify the weights that you want
to use when combining two or more distributions of results. The weights should sum to one. If
not, BenMAP normalizes the weights so that they do.
Sum Dependent Pooling. Summing two or more incidence or valuation results, assuming the
underlying functions are correlated.
Sum Independent Pooling. Summing two or more incidence or valuation results, assuming the
underlying functions are independent (uncorrelated).
Threshold.An air quality level below which benefits are not calculated. For example, if the
threshold is 10 μg/m3, then only areas with PM2.5 concentrations equal to or greater than 10 μg/m3
will be included in estimating health incidence results.
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