land_price — land_price • magpie4

Calculates MAgPIE MAgPIE land shadow prices based on a gdx file

Usage

land_price(
  gdx,
  file = NULL,
  level = "reg",
  ignore_lowbound = FALSE,
  absolute = TRUE,
  digits = 4
)

Arguments

gdx: GDX file
file: a file name the output should be written to using write.magpie
level: Level of regional aggregation; "reg" (regional), "glo" (global), "regglo" (regional and global) or any other aggregation level defined in superAggregate
ignore_lowbound: Some shadow prices are positive (see Details), corresponding to a lower bound for that pool. TRUE sets them to 0. Default value: FALSE.
absolute: Should the absolute value of all the marginals be taken into calculations? TRUE (default) of FALSE. See Details.
digits: rounding accuracy for the output

Value

A MAgPIE object containing the land shadow prices (US$2017/ha).

Details

The land price is obtained through marginals of the "oq_cropland" constraint. The majority of these marginals are negative values, and a negligible number of them are positive. This is the consequence of the constraint binding either on upper or lower level. The parameter ignore_lowbound removes all the positive marginals from land price calculation (negligible), and parameter absolute transforms them into negative values (to be all together reported as positive values at the final calculation).

Author

Markus Bonsch, Misko Stevanovic

Examples


  if (FALSE) { # \dontrun{
    x <- land_price(level="regglo", products="kcr")
  } # }