Martin Peitz gave a short course “Competition Economics of Platform Markets” at the Chilean competition authority, Fiscalía Nacional Económica (FNE). He gave the presentations “Public Policy in Big Data Markets” and “Digital Platforms: Reviews, Ratings and Recommendations” at the Argentinian competition branch, Comisión Nacional de la Defensa de la Competencia (CNDC). At both institutions he had informal discussions about competition policy challenges in platform markets.