Template-Type: ReDIF-Paper 1.0 Author-Name: Jon Frost Author-X-Name-First: Jon Author-X-Name-Last: Frost Author-Name: Jean-Charles Rochet Author-X-Name-First: Jean-Charles Author-X-Name-Last: Rochet Author-Name: Hyun Song Shin Author-X-Name-First: Hyun Author-X-Name-Last: Song Shin Author-Name: Marianne Verdier Author-X-Name-First: Marianne Author-X-Name-Last: Verdier Title: Competing digital monies Abstract: We compare three competing digital payment instruments: bank deposits, digital platform tokens and central bank digital currencies (CBDCs). A simple theoretical model integrates the theory of two-sided markets and payment economics. We use the model to assess the impact of a public option such as a fast payment system that makes private payment instruments interoperable, or a CBDC that provides general access to public digital money. We show that both options are essentially equivalent for the industrial organisation of the payment system. We find that, even if they may lead to some degree of disintermediation, both options can contribute to increasing financial inclusion and improving social welfare. Creation-Date: 2025-11 File-URL: https://www.bis.org/publ/work1301.pdf File-Format: Application/pdf File-Function: Full PDF document File-URL: https://www.bis.org/publ/work1301.htm File-Format: text/html Number: 1301 Keywords: payments, CBDC, fast payments, banks, big tech, platforms Classification-JEL: E42, E58, G21, L51, O31 Handle: RePEc:bis:biswps:1301