This paper investigates the effect of liquidity-saving mechanisms (LSMs) in interbank payment systems. We model a stylised two-stream payment system where banks choose (a) how much liquidity to post and (b) which payments to route into each of two ‘streams': the RTGS stream, and an LSM stream....

The evolution and structure of the payments system is explained by efficiency gains from substituting claims on particular institutions for commodity money. Information-intensive lending and payments services have been provided jointly by the same set of institutions, i.e., banks, because...