How to deal with an "essentially contested concept" on the field? Sampling social innovations through the Delphi method

  • Ela Callorda Fossati Université catholique de Louvain
  • Florence Degavre
  • Marthe Nyssens


How to select cases in social innovation research? Sampling units of analysis is indeed a challenging methodological question since social innovation theory is controversial and fragmented. In the absence of any database and given the limits of conventional techniques, sampling is only possible through participative methods that make sense of opposing perceptions and contestedness. This article presents the Delphi method and its related principles of expertise, iterative consultation and consensus forming and shows how it served to identify a pool of cases of social innovation, sort them out and finally establish a sample of social innovations in a partnership research on innovative practices in domiciliary eldercare.


Author Biography

Ela Callorda Fossati, Université catholique de Louvain



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How to Cite
Callorda Fossati, E., Degavre, F., & Nyssens, M. (2017). How to deal with an "essentially contested concept" on the field? Sampling social innovations through the Delphi method. European Public & Social Innovation Review, 2(1), 45-58. Retrieved from
Research articles