Quantity index operator

Remaps price arguments into quantity argument (and vice versa) to turn a price index into a quantity index.

Usage

quantity_index(f)

Arguments

f

A price-index function.

Value

A function like f, except that the role of prices/quantities is reversed.

See also

Other operators: balanced(), grouped()

Examples

p1 <- price6[[3]]
p0 <- price6[[2]]
q1 <- quantity6[[3]]
q0 <- quantity6[[2]]

# Remap argument names to be quantities rather than prices

quantity_index(laspeyres_index)(q1 = q1, q0 = q0, p0 = p0)
#> [1] 1.175887

laspeyres_index(p1 = q1, p0 = q0, q0 = p0)
#> [1] 1.175887

# Works with the index_weights() functions, too

quantity_index(index_weights("Laspeyres"))(q0 = q0, p0 = p0)
#> [1] 0.96 2.70 2.47 0.91 6.58 0.48