Compute design effect and effective sample size

The design effect (deff) measures the variance inflation factor due to unequal weighting. The effective sample size is n / deff.

Usage

design_effect(weights)

Arguments

weights

Numeric weight vector.

Value

A list with deff (design effect) and n_eff (effective sample size).

Examples

w <- c(1.2, 0.8, 1.5, 0.5, 1.0)
design_effect(w)
#> $deff
#> [1] 1.116
#> 
#> $n_eff
#> [1] 4.480287
#>