L'uso delle reti sociali per la costruzione di campioni probabilistici: possibilità e limiti per lo studio di popolazioni senza lista di campionamento

digital

Articolo

Rivista

Fascicolo

STUDI DI SOCIOLOGIA - 2010 - 3

Titolo

L'uso delle reti sociali per la costruzione di campioni probabilistici: possibilità e limiti per lo studio di popolazioni senza lista di campionamento

Autore

Alberto Vitalini

Editore

Vita e Pensiero

Formato

Articolo |

Pdf

Online da

03-2010

Issn

0039-291X (stampa) | 1827-7896 (digitale)

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Descrizione

A. VITALINI, The use of social networks for the construction of probability samples: opportunities and limitations for the study of populations without sampling frame
Populations without sampling frame, usually called hidden populations, are inherently hard to sample by conventional sampling designs. Often the only practical methods of obtanining the sample involve following social links from some initially identified respondents to add more research partecipants to the sample. These kinds of link-tracing designs make the sample liable to various forms of bias and make extremely difficult to generalize the results to the population studied. This article describes some attempts to build a statistical theory of link-tracing designs and illustrates, deeply, the Respondent-Driven Sampling, a link-tracing sampling design that should allow researchers to make, in hidden populations, asymptotically unbiased estimates under certain conditions. Last, the article discusses some features and problems of the Respondent-Driven Sampling which deserve further investigation and study.
Key words: snowball sampling, link-tracing sampling, sampling hidden populations, responentdriven sampling, Markov chain.