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Financial Intermediation, International Risk Sharing, and Reserve Currencies

American Economic Review 2017 107(10), 3038-3071
I model the equilibrium risk sharing between countries with varying financial development. The most financially developed country takes greater risks because its financial intermediaries deal with funding problems better. In good times, the more financially developed country consumes more and runs a trade deficit financed by the higher financial income that it earns as compensation for taking greater risk. During global crises, it suffers heavier losses. Its currency emerges as the reserve currency because it appreciates during crises, thus providing a good hedge. I provide evidence that financial net worth plays a crucial role in understanding this asymmetric risk sharing.

Internationalizing Like China

American Economic Review 2025 115(3), 864-902
We empirically characterize how China is internationalizing its bond market by staggering the entry of different types of foreign investors into its domestic market and propose a dynamic reputation model to explain this strategy. Our framework rationalizes China’s strategy as trying to build credibility as a safe issuer while reducing the cost of capital flight. We use our framework to shed light on China’s response to episodes of capital outflows.

Five Facts about Beliefs and Portfolios

American Economic Review 2021 111(5), 1481-1522 open access
We study a newly-designed survey administered to a large panel of wealthy retail investors. The survey elicits beliefs that are important for macroeconomics and finance, and matches respondents with administrative data on their portfolio composition, their trading activity, and their log-in behavior. We establish five facts in this data: (1) Beliefs are reflected in portfolio allocations. The sensitivity of portfolios to beliefs is small on average, but varies significantly with investor wealth, attention, trading frequency, and confidence. (2) Belief changes do not predict when investors trade, but conditional on trading, they affect both the direction and the magnitude of trades. (3) Beliefs are mostly characterized by large and persistent individual heterogeneity. Demographic characteristics explain only a small part of why some individuals are optimistic and some are pessimistic. (4) Expected cash flow growth and expected returns are positively related, both within and across investors. ( These five facts provide useful guidance for the design of macro-finance models.