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and Bullard, James. "Non-Uniform Currencies and Exchange Rate Chaos : Slides : CoinDesk, Consensus 2018, New York, N.Y." in Statements and Speeches of James Bullard
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https://fraser.stlouisfed.org/title/7161/item/654878/content/pdf/bullard_20180514_slides, accessed on May 10, 2026.