We give necessary and sufficient conditions for the second-order inclusion probabilities to be strictly positive under Chao's (1982) sampling plan for some order of arrangement of the population units ...

Since 1937, The Public Opinion Quarterly has been the leading interdisciplinary journal for practitioners and academicians studying the development and role of communication research, current public ...

By Courtney Kennedy, Andrew Mercer, Scott Keeter, Nick Hatley, Kyley McGeeney and Alejandra Gimenez As the costs and nonresponse rates of traditional, probability-based surveys seem to grow each year, ...

Adherence to regulatory limits for mycotoxins in agricultural commodities is important to safeguard consumers and to permit trade in affected commodities across international borders. Reliable ...