This paper was prepared by Paulo Burnier with research support by Pablo Suárez Halbach and benefited from comments by Ori Schwartz and Pablo Ramirez Ayala (all from the OECD Competition Division).
The paper serves as background material for the discussion on “Competition Law Enforcement in Informal Markets” taking place at the 2026 OECD-IDB Latin American and Caribbean Competition Forum in Buenos Aires, Argentina.
The OECD is thankful to the Brazilian Administrative Council for Economic Defence (CADE) who kindly provided a voluntary contribution in support of the LACCF’s work this year.