In this paper, we compare six almost unbiased ratio estimators with respect to bias and efficiency for (i) finite populations, and (ii) infinite populations in which the joint distribution of the characters under study is bivariate normal.
CitacióDalabehera, M.; Sahoo, L.N. "Comparison of six almost unbiased ratio estimators". Qüestiió. 1994, vol. 18, núm. 3