This presentation by Frederica Maiorano and Marcelo Guimarães (OECD Competition Division) was made during a discussion on the Interactions between competition authorities and sector regulators at the 21st meeting of the OECD Global Forum on Competition on 2 December 2022. More papers and presentations on the topic can be found out at https://oe.cd/icar. This presentation was uploaded with the author’s consent.