In today's digital world, concerns about consumer privacy are growing. Regulators are thinking about limiting how long tracking technology can be used. It is important to understand the economic effects of these possible changes. Today’s guest is Klaus Miller, an Assistant Professor of Marketing at HEC Paris. He talks about the research he and his colleague did on this topic, which was recently published in the International Journal of Research in Marketing (IJRM). He explains how tracking works, the economic impact of different rules, and what the future of online advertising might look like.