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Journal Article
The Blockchain Revolution: Decoding Digital Currencies
Cryptocurrencies and decentralized finance have grown considerably since the publication of the white paper on bitcoin in 2009. This article presents an overview of cryptocurrencies, blockchain technology, and their applications, explaining the spirit of the enterprise and how it compares with traditional operations. We discuss money, digital money, and payments; cryptocurrencies, blockchain, and the double-spending problem of digital money; decentralized finance; and central bank digital currency.
Speech
The first line of defense and financial crime: keynote Address at the 1LoD Summit, New York City
Keynote Address at the 1LoD Summit, New York City.
Working Paper
Eggs in One Basket: Security and Convenience of Digital Currencies
Digital currencies store balances in anonymous electronic addresses. We analyze the trade-offs between safety and convenience of aggregating balances in addresses, electronic wallets and banks. In our model agents balance the risk of theft of a large account with the cost to safeguarding a large number of passwords of many small accounts. Account custodians (banks, wallets and other payment service providers) have different objectives and tradeoffs on these dimensions; we analyze the welfare effects of differing industry structures and interdependencies, and in particular the consequences ...
Faster Payments, More Disruptions
New payment technologies have transformed the banking system by increasing the efficiency and mechanisms to transfer funds. How will these innovations disrupt the banking system?
Speech
Considerations on the Road Ahead for Monetary Policy Implementation
Remarks at the New York Fed and Columbia SIPA Monetary Policy Implementation Workshop, New York City.
Discussion Paper
What Makes Cryptocurrencies Different?
Permissionless blockchains, which support the most popular cryptocurrency networks like Bitcoin and Ethereum, have shown that it is possible to transfer value without relying on centralized trusted third parties, something that is new and remarkable (although perhaps most clearly useful for less developed financial markets). What makes permissionless blockchains able to transfer value without relying on a small number of trusted third parties is the combination of several components that all need to work together. The components themselves are not particularly new, but the combination of ...
Briefing
How Did We Get Here? From Observing Private Currencies to Exploring Central Bank Digital Currency
The emergence of private digital currencies has inspired discussion over the possibility of central bank-issued digital currencies. While privately issued currencies are not new, the rise of digital currencies has highlighted both concerns and opportunities for central banks.
Tokens vs. Accounts: Why the Distinction Still Matters
Computer science experts may say the difference is irrelevant in the digital world. But when it comes to payments, distinguishing the two still has value in the real world.
Working Paper
Central Bank Digital Currencies: An Old Tale with a New Chapter
We consider the debut of a new monetary instrument, central bank digital currencies (CBDCs). Drawing on examples from monetary history, we argue that a successful monetary transformation must combine microeconomic efficiency with macroeconomic credibility. A paradoxical feature of these transformations is that success in the micro dimension can encourage macro failure. Overcoming this paradox may require politically uncomfortable compromises. We propose that such compromises will be necessary for the success of CBDCs.