Abstract
The accelerating digitization of global financial systems has elevated Central Bank Digital Currencies (CBDCs) from theoretical constructs to active instruments of monetary reform. Defined as sovereign digital liabilities issued directly by central monetary authorities, CBDCs occupy a structurally distinct position relative to decentralized cryptocurrencies and privately issued stable coins, principally by virtue of their legal tender status and the full faith of the issuing state. This systematic review synthesizes the extant empirical and theoretical literature on CBDC design architectures, payment infrastructure modernization, financial inclusion dynamics, and monetary policy transmission pathways. Drawing upon the institutional innovation framework and canonical monetary economics, the study constructs an analytical model linking CBDC adoption intensity with monetary system efficiency outcomes across a cross-national panel of economies at varying stages of digital currency experimentation, including China, Sweden, India, Nigeria, and the Bahamas. The review finds substantive evidence that well-designed CBDC frameworks can materially reduce transaction settlement latency, lower intermediation costs, and extend formal financial access to unbanked and underbanked populations. Concurrently, the analysis surfaces critical systemic risks, namely the potential for structural banking disintermediation, sovereign cybersecurity exposure, and erosion of transactional privacy. The study advances the CBDC literature by articulating the institutional preconditions regulatory coherence, technological redundancy, and international coordination architecture necessary for sustainable digital currency deployment. Policy implications for central bank governors, financial regulators, and multilateral institutions are discussed in detail.
