Some Results Concerning Horvitz-Thompson 's Tl -Class of Estimators.
A Simple Method of Sampling without Replacement with Inclusion-Probabilities Exactly Proportional to Size .
On Estimating the Variance of a Finite Population.
Randomized Response: Estimating Mean Square Errors of Linear Estimators and Finding Optimal Unbiased Strategies.
A Non-Negativity Criterion for a Certain Variance-Estimator.
On Two Properties of an Unequal Probability Sampling Scheme.
On Efficiency of the Ratio Estimator.
On Non-Negative Variance-Estimation.
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