Network Scale Up Method

This method allows population size estimates using indirect measures of respondents’ social networks. A social network is a set of people that a person knows; this set of people is, on average, representative of the general population in which respondent live and move.

The technique consists in asking people about problems indirectly, i.e.: problems that in principle are not regarding him or her directly, asking instead on how many people he or she knows with specific characteristics. The network scale-up does not require the key population to report on its own highly stigmatized and sometimes illegal behaviors or “sensitive” issues.


Discover Z-NSUM method.




  • Zeta Research has the exclusive rights of using a method to measure “sensitive” issues for clinical and market research in Italy.
    Click here to find out more regards..
  • Zeta Research is going to present new Scale-up methods at UN conference in Brasil. Exclusively rapresenting it for Italian market.
    Read more about Z-NSUM


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