The elasticity of substitution between goods from different countries—the Armington elasticity—is important for many questions in international economics, but its magnitude is subject to debate: the "macro" elasticity between home and import goods is often found to be smaller than the...

This paper develops a procedure to rank-order countries and commodities using disaggregated US imports data. It finds strong evidence that both countries and commodities can be ranked, consistent with the ‘product cycle’ hypothesis. Countries habitually begin to export goods to the United...

This paper argues that the theoretical foundations for the gravity equation are general, while the empirical performance of the gravity equation is specific to the type of goods examined. Most existing theory for the gravity equation depends on the assumption of differentiated goods. We show...

The latest World Bank estimates of real GDP per capita for China are significantly lower than previous ones. We review possible sources of this puzzle and conclude that it reflects a combination of factors, including substitution bias in consumption, reliance on urban prices which we estimate...

What determines sovereign risk? We study the London bond market from the 1870s to the 1930s. Our findings support conventional wisdom concerning the limited credibility of the interwar gold standard. Before 1914, gold standard adherence effectively signalled credibility and shaved 40 to 60 basis...

We develop an analytically tractable two-country model that marries a full account of global macroeconomic dynamics to a supply framework based on monopolistic competition and sticky nominal prices. The model offers simple and intuitive predictions about exchange rates and current accounts that...

In the face of huge balance of payments surpluses and internal inflationary pressures, China has been in a classic conflict between internal and external balance under its dollar currency peg. Over the longer term, China’s large, modernizing, and diverse economy will need exchange rate...

This paper develops a dynamic continuous-time model in which international risk sharing can yield substantial welfare gains through its positive effect on expected consumption growth. The mechanism linking global diversification to growth is an attendant world portfolio shift from safe, but...

The recent financial crisis teaches important lessons regarding the lender-of-last resort function. Large swap lines extended in 2007-08 from the Federal Reserve to other central banks show that the classic concept of a national last-resort lender fails to address key vulnerabilities in a...

Because of recent economic crises, financial fragility has regained prominence in both the theory and practice of macroeconomic policy. Consistent with macroeconomic paradigms prevalent at the time, the original architecture of the euro zone assumed that safeguards against inflation and...