OM is monopoly production (i.e. output that maximizes joint surplus that maximizes N(OM, OM) Oo is each firm acting independently, i. that maximizes T( 20, go just over the first argument Finally, @ c maximizes (@G, OM)just over the first argument Pofits under perfect monopoly are denoted OM, Q Repeated game literature(Abreu, Abreu Pearce and stachetti tells us that a monopoly outcome is not sustainable ifQM is monopoly production (i.e. output that maximizes joint surplus), that maximizes NQM,QM  QO is each firm acting independently, i.e. that maximizes  QO,QO just over the first argument. Finally, QC maximizes  QC,QM just over the first argument. Pofits under perfect monopoly are denoted  QM,QM Repeated game literature (Abreu, Abreu Pearce and Stachetti) tells us that a monopoly outcome is not sustainable if: