Add WHEP polity codes to a table — add_polity

Adds periodized polity_code information from polity_area_crosswalk to a table with FAOSTAT/FABIO area_code values. If a year column is present, the mapping is year-aware; otherwise the current/default mapping is used.

Usage

add_polity_code(
  table,
  code_column = "area_code",
  year_column = "year",
  polity_code_column = "polity_code",
  backcast_anchor = 1961L
)

Arguments

table: A data frame.
code_column: Name of the column containing numeric area codes.
year_column: Name of the column containing years. Set to NULL to force current/default mapping.
polity_code_column: Name of the output polity-code column.
backcast_anchor: First year of reported (non-back-cast) FAOSTAT data, default 1961. Years before it are matched to the polity active in the anchor year, because WHEP's pre-anchor series are back-cast onto the anchor-year territory rather than reported under their data-year borders. Set to -Inf to disable and match strictly by data year.

Value

A tibble with added polity metadata columns.