Estimation effect (deff_est)

[djhurio]

Estimation effect (deff_est) could be wrong if the sum of calibrated weights (cw) is not equal to the sum of cw / g (pre-calibration weights). Probably corresponds only to the ratio estimation. The cause of the error is in the ratio linearization step.

To ensure correct estimation of the deff_est the sum of cw should be equal to the sum of cw / g.

Possible mitigation. The following adjustment of the g weights could be applied:

dat[, g_adj := g * sum(cw / g) / sum(cw)]