Sampling in the twenty-first century

This article summarizes the most significant developments in survey samplin g in the twentieth century, especially as they relate to marketing and mark eting research, and attempts to predict, based on what we know now signific ant developments that will occur early in the twenty-first century. The art icle is divided into the following sections: (I) Developments in Door-to-Do or Sampling, (2) Developments in Telephone and Mail Surveys, (3) Location S amples, (4) Focus Groups and Other Sloppy Samples, (5) Sampling Rare Popula tions, (6) Business Surveys, (7) Panels, (8) Developments in the Theoretica l Foundation of Survey Sampling, and (9) The Evolutionary Process and Futur e Developments.