On a Simple Procedure of Unequal Probability Sampling Without Replacement
J. N. K. Rao, H. O. Hartley, W. George Cochran · Journal of the Royal Statistical Society Series B (Statistical Methodology) · 1962
SUMMARY A simple procedure of unequal probability sampling without replacement is proposed. It leads to an estimator of the population total having a smaller variance than is obtained by sampling with replacement. Other advantages of the present method are simplicity of calculation and the possibility of estimating exactly the variance of the estimator.