Supplementary Information for "The butterfly matchmaking model for circular construction: Towards a digital matchmaking platform tailored to French policy"

This record contains the supplementary information associated with the article “The Butterfly Matchmaking Model for Circular Construction: Towards a digital matchmaking platform tailored to French policy”. The supplementary material provides additional empirical and methodological documentation supporting the development of the Butterfly Matchmaking Model. It includes: (1) a comparative analysis of 22 French digital platforms for circular construction, documenting their scope, material types, access conditions, transaction mechanisms, quality control practices, business models, performance indicators, and update frequency; (2) the open-ended interview guideline used to support stakeholder interviews on circular construction, digitalization, matchmaking, stakeholder dynamics, material alternatives, and future developments; and (3) a comparison of circular economy indicators in France against the EU-27 average, compiled from the EU Monitoring Framework on the Circular Economy. The record is intended to support transparency, reproducibility, and reuse of the contextual and methodological materials underlying the article. It does not include confidential interview transcripts, recordings, or personally identifiable participant data. This supplementary information should be cited alongside the corresponding journal article when referring to the platform review, interview guideline, or circular economy indicator comparison used in the study.