Privacy International welcomes the opportunity to file these comments in advance of the Federal Trade Commissions public hearings on competition and consumer protection in the 21st century. Privacy International is a non-profit, non-governmental organisation based in London, the United Kingdom (UK), dedicated to defending the right to privacy around the world. Established in 1990, Privacy International undertakes research and investigations into government surveillance and data exploitation in the private sector with a focus on the technologies that enable these practices. To ensure universal respect for the right to privacy, Privacy International advocates for strong national, regional and international laws that protect privacy around the world. It has litigated or intervened in cases implicating the right to privacy in the courts of the United States, the UK, and Europe. It also strengthens the capacity of partner organisations in developing countries to identify and defend against threats to privacy. In particular, Privacy International writes to elaborate on the following issues with respect to topic 4 on the intersection between privacy, big data and competition: I. Assessing data as a dimension of competition; II. Assessing impact of competition on privacy; III. Assessing the benefits of privacy regulations; IV. Assessing competition and consumer protection of tracking users; V. Assessing lack of transparency in the data ecosystem. Details of the above issues are included in the uploaded file.