Highlights the emergence of a "hybrid collective model" of collaboration between patients and experts through a systematic study in the field of rare diseases in France and Portugal, with attention to the reflexive work carried out by patients' organizations on the notion of rareness.

Introduces the notions of ontological uncertainty and of problematization sites for the analysis of innovation and discusses political implications.

Provides some theoretical developments on the topic of the performativity of economics.

Discusses the performativity of economics and proposes theoretical directions to study it from a sociological perspective.