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Do two sources agree?

Source: R/sources.R
compare_sources.Rd

Fetch the same indicator from several providers and put the answers side by side. Sources disagree more often than people expect – different vintages, PPP bases, territorial definitions, revision schedules – and on the ISO spine the comparison is one join. This is the verb that turns "I used OWID" into "I used OWID, and here is where it differs from the World Bank".

Usage

compare_sources(
  indicator,
  sources = c("wdi", "owid"),
  year,
  countries = NULL,
  tolerance = 0.05
)

Arguments

indicator

Either one indicator code used for every source, or a named character vector giving each source its own code: c(wdi = "NY.GDP.PCAP.KD", owid = "gdp_per_capita").

sources

Source names to compare (default c("wdi", "owid")).

year

A single year.

countries

Optional iso3c subset.

tolerance

Relative difference above which a country counts as a disagreement (default 0.05, i.e. 5%).

Value

A tibble with one row per country: the value from each source, n_sources (how many reported it), rel_diff (max relative spread) and disagrees. The correlation, coverage and disagreement summary is attached as the "countryatlas_source_summary" attribute.

See also

fetch_indicator(), country_sources()

Examples

if (FALSE) { # \dontrun{
cmp <- compare_sources(c(wdi = "NY.GDP.PCAP.KD", owid = "gdp_per_capita"),
                       sources = c("wdi", "owid"), year = 2020)
attr(cmp, "countryatlas_source_summary")
} # }