This paper proposes a new product-type estimator which is complementary, in a certain sense, to the commonly used ratio estimator. Exact formulae for the bias and ...

Logistic regression analysis, which estimates odds ratios, is often used to adjust for covariables in cohort studies and randomized controlled trials (RCTs) that study a dichotomous outcome. In ...

Groundwater is an important source for clean drinking water and vital to human and ecological health. Its importance will continue to rise with increasing population and associated demands by ...