Arcos, Antonio; Contreras, José M.; Rueda, María M. - In: Sociological Methods & Research 43 (2014) 3, pp. 465-489
Social surveys generally assume that a sample of units (students, individuals, employees,…) is observed by two-stage selection from a finite population, which is grouped into clusters (schools, household, companies,…). This design involves sampling from two different populations: the...