Knauf Group is the second largest supplier of plasterboard in the world.In November 2021 Knauf acquired 100% of the firm but announced "despite the best efforts of USG Boral's New Zealand team,we have been unable to build a sustainable business and it is with great sadness that we announce that we will be exiting the New Zealand market" as it "presented several significant challenges to a new market entrant such as us."The board of Knauf is considering re-entering the NZ market if competitive conditions become more favourable. What are the actions Commerce Commission could take which would facilitate the re-entry of Knauf and encourage competition in the sector