In recent years, proponents of non-probability sample surveys and alternative data collection techniques have questioned the foundations of traditional survey research. Although evidence of large biases using traditional methods has not yet emerged, declining response rates and rising costs may...

This paper uses distribution-free formulas for the asymptotic variances of sample quantile income shares - as typically published by statistical agencies as measures of the distribution of income inequality - to calculate how large a survey sample must be in order to estimate a more refined...