Attenuating the nonresponse bias in hunting bag surveys: The multiphase sampling strategy
Fig 3
For the simulated population, bias index of the Hansen & Hurwitz estimator as a function of the nonresponse rate at the last phase.
Curve of the bias index based on 1000 simulations of the nonresponse mechanism, for πz = 0.2, πm(1) = 0.85, and πm(2) = 0(0.1)0.9. Details in the text.