Matteo Maggiori on the Global Capital Allocation Project, Exorbitant Privilege, and Dollar Runs

Episode Summary

Executive Summary: David Beckworth interviews Stanford economist Matteo Maggiori about global capital flows, tax havens, reserve currencies, and the international monetary system. Maggiori explains how new data reveal hidden U.S. exposure to emerging markets, why the dollar strengthened after the financial crisis, and why the Triffin dilemma remains relevant: global demand for safe dollar assets can both reinforce U.S. privilege and create long-run instability.

Main Topics: Maggiori’s path into international economics (Priority: 3/5): He traces his interest to Italy’s 1992 EMS crisis and later to mentors who showed him academic research could be a career, especially Lucio Sarno and his PhD at Berkeley. Global Capital Allocation Project and new data on capital flows (Priority: 5/5): He describes a collaborative research lab with Jesse Schreger and Brian Neiman aimed at uncovering how capital is allocated globally using newly available microdata and making methods public through a website. Tax havens and hidden U.S. investment exposure (Priority: 5/5): The discussion highlights how offshore centers like the Cayman Islands obscure the true scale of U.S. holdings abroad, especially equity exposure to Chinese firms listed via offshore structures. Dollar dominance and the fall of the euro (Priority: 5/5): Maggiori explains that after the 2008 crisis the dollar became even more central in global portfolio allocation, while the euro did not emerge as a comparable international currency. Model of the international monetary system and the Triffin dilemma (Priority: 5/5): He and Emmanuel Farhi model the system as the production of safe assets under limited commitment, where high demand can tempt issuers to over-expand debt and risk a crisis. U.S. as banker to the world and systemic instability (Priority: 4/5): The U.S. is portrayed as issuing safe liabilities and holding riskier assets, but this banker role can itself generate bank-run-like crises if confidence in the dollar is shaken. Multipolar reserve-currency worlds and network effects (Priority: 4/5): The conversation explores whether a world with multiple reserve currencies would be more stable or more prone to coordination failures, runs, and shifting expectations.

Key Arguments: Global capital allocation cannot be understood well from old aggregate data; microdata reveal much larger cross-border positions and different currency composition than previously thought. Tax havens materially distort measured foreign investment: U.S. holdings in China are far larger once Cayman-based listings are unraveled. The dollar’s share in third-party cross-border corporate bond holdings rose sharply after the global financial crisis, suggesting crisis reinforced rather than weakened dollar centrality. European firms do not use the euro internationally in the same way U.S. firms use the dollar; the eurozone has not generated a comparable safe-asset ecosystem. The international monetary system is best understood as a mechanism for manufacturing safe assets, not just as a fixed-vs-floating exchange-rate arrangement. The Triffin dilemma is fundamentally fiscal: the issuer of the reserve currency faces a trade-off between supplying enough safe assets and preserving confidence in repayment. A reserve-currency issuer with monopoly-like privilege may still over-issue debt when demand is strong, because low borrowing costs and monopoly rents create incentives to risk a future crisis. Market prices may not warn in advance of a reserve-currency crisis; low rates can persist right before a sudden loss of confidence. A multipolar reserve system could bring diversification benefits, but it also raises coordination problems and weakens each issuer’s commitment. The U.S. as banker to the world is not automatically stable; like banks, the system can be vulnerable to runs when confidence shifts.

Data Points: Cayman Islands share of U.S. foreign portfolio assets: 14% - Maggiori cites the Cayman Islands as a major destination for U.S. foreign portfolio assets. Official U.S. equity investment in China (2017): about $150 billion - Shown by official data before unwinding tax-haven structures. U.S. equity investment in China after unwinding Cayman holdings: about $700 billion - After adding roughly $650 billion hidden through Cayman Islands structures. Increase from tax-haven adjustment: +$650 billion - Difference between official reported U.S. investment in China and the adjusted figure. Dollar share of cross-border corporate bond portfolios before 2008: around 40% - Third-party cross-border holdings excluding U.S. and EU as holders/issuers. Dollar share of cross-border corporate bond portfolios after crisis: over 60%, close to 70% - Shows post-crisis shift toward dollar-denominated assets. Time horizon for Triffin-style crises: roughly 50–60 years - Maggiori notes rare events and the difficulty of predicting them. U.S. debt-to-GDP after pandemic-era borrowing: around 100% - He references the rapid rise in U.S. debt after the paper was published.

Pivotal Quotes: "the monetary system was really an agreement on trying to generate safe assets" — Matteo Maggiori: He explains the core conceptual lens of his QJE paper with Emmanuel Farhi. "the dollar roll, if anything, became even more central than it's ever been" — Matteo Maggiori: He summarizes the post-crisis finding that dollar dominance intensified after 2008. "the problem is much more fiscal" — Matteo Maggiori: He clarifies that the Triffin dilemma is not mainly about fixed exchange rates but government fiscal capacity and credibility.

Implications: The episode suggests the dollar’s dominance is resilient but not risk-free. Listeners should expect continued global demand for dollar assets, hidden exposures via offshore finance, and ongoing debate over how much fiscal capacity the U.S. can safely deploy.