Laspeyre price index.

The Laspeyre price index calculated as $$ \frac{\sum_i p^t_i q^b_t}{\sum_i p^b_i q^b_i}.$$ Arguments can either be vectors or matrices.

Usage

p_laspeyre(pt, pb, qb)

Arguments

pt

A n-vector (or m x n matrix) of prices in current period.

pb

A n-vector (or m x n matrix) of prices in the baseline period.

qb

A n-vector (or m x n matrix) of quantities in the baseline period.

Value

Price index between current an baseline period (number or vector).

Examples

Pt <- matrix(1:6, ncol = 2)
Pb <- Pt*0.7
Qb <- matrix(2:7, ncol = 2)
p_laspeyre(Pt, Pb, Qb)
#> [1] 1.428571 1.428571 1.428571
p_laspeyre(Pt[1,], Pb[1,], Qb[1,])
#> [1] 1.428571