Some Simple Economics of Stablecoins
本文梳理了稳定币的关键设计选择（如储备构成、稳定机制），分析其对金融竞争、监管挑战和宏观经济稳定的影响，并讨论其在实时支付、金融包容和DeFi中的应用。
Stablecoins have the potential to drastically increase competition and innovation in financial services by reducing our reliance on traditional intermediaries. But they also introduce new challenges, as regulators rely on intermediaries to ensure financial stability, market integrity, and consumer protection. Because they operate at the interface between traditional banking and cryptocurrencies, stablecoins also represent an ideal setting for understanding the key trade-offs cryptocurrencies involve, and insights from robust stablecoin design and regulation are highly relevant for related innovations in decentralized finance (DeFi), nonfungible tokens, and Web3 protocols. In this review, we describe the following: key stablecoin design choices, from reserve composition to stability mechanism; legal claim against the issuer; noninterference with macroeconomic stability; and interoperability with public sector payment rails and central bank digital currencies. Last, we cover the key benefits of stablecoins in the context of real-time, low-cost programmable payments, financial inclusion, and DeFi.