Chaudhuri, ArijitDihidar, Kajal2014-06-182014-06-182009Sankhya : The Indian Journal of Statistics, v.71, Series B, no.1, p.123-136http://hdl.handle.net/10263/5942enOptional randomized responsesUnbiased estimationVarying probability samplingEstimating means of stigmatizing qualitative and quantitative variables from discretionary responses randomized or directArticle