It is trivial to turn a price index into a quantity index by switching the role of prices and quantities in the index-number formula. This function does just that.
A function to compute a price index. See
A function like
price_index, except that the role of prices/quantities has been reversed.
price_index for the possible functions that can serve as inputs.
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# Make some data p0 <- price6[] q1 <- quantity6[] q0 <- quantity6[] # Just remaps argument names to be quantities rather than prices quantity_index(index_laspeyres)(q1 = q1, q0 = q0, p0 = p0) index_laspeyres(p1 = q1, p0 = q0, q0 = p0) # Works with the index_weights() functions, too quantity_index(index_weights("Laspeyres"))(q0 = q0, p0 = p0)
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