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Report
U.S. Market Concentration and Import Competition
A rapidly growing literature has shown that market concentration among domestic firms has increased in the United States over the last three decades. Using confidential census data for the manufacturing sector, we show that typical measures of concentration, once adjusted for sales by foreign exporters, actually stayed constant between 1992 and 2012. We reconcile these findings by linking part of the increase in domestic concentration to import competition. Although concentration among U.S.-based firms rose, the growth of foreign firms, mostly at the bottom of the sales distribution, ...
Working Paper
Escaping the Middle-Income Trap: A Cross-Country Analysis on the Patterns of Industrial Upgrading
With rapid industrial upgrading along the global value chain of manufactured goods, China has transformed, within one generation, from an impoverished agrarian society to a middle-income nation as well as the largest manufacturing powerhouse in the world. This article identifies the pattern of China?s industrial upgrading and compares it with those of other successfully industrialized economies and the failed ones. We find that (i) China (since 1978) followed essentially the same path of industrial upgrading as that of Japan and the ?Asian Tigers.? These economies succeeded in catching up ...
Working Paper
Trade Risk and Food Security
We study the role of international trade risk for food security, the patterns of production and trade across sectors, and its implications for policy. We document that food import dependence across countries is associated with higher food insecurity, particularly in low-income countries. We provide causal evidence on the role of trade risk for food security by exploiting the exogeneity of the Ukraine-Russia war as a major trade disruption limiting access to imports of critical food products. Using micro-level data from Ethiopia, we empirically show that districts relatively more exposed to ...
Working Paper
Measuring Geopolitical Fragmentation: Implications for Trade, Financial Flows, and Economic Policy
Recent geopolitical tensions have revived interest in understanding the economic consequences of geopolitical fragmentation. Using bilateral trade flows, portfolio investment data, and detailed records of economic policy interventions, we revisit widely-used geopolitical distance metrics, specifically the Ideal Point Distance (IPD) derived from United Nations General Assembly voting. We document substantial variability in measured fragmentation, driven significantly by methodological choices related to sample periods and vote categories, especially in the wake of Russia’s 2022 invasion of ...
Working Paper
Technology, Geography, and Trade over Time: The Dynamic Effects of Changing Trade Policy
I study the dynamic effects of changes in trade policy in a multi-country model with firms that make durable and destination-specific investments in exporting capacity. Using Mexican exporter-level data, I show that incumbent exporters to minor trade partners account for a smaller share of bilateral exports than do incumbent exporters to major trade partners, indicating a systematic difference in the persistence of the export decision across destinations. The model is calibrated to capture the positive relationship between exporting persistence and export volume, and predicts that trade ...
Working Paper
Social Distancing, Vaccination and Evolution of COVID-19 Transmission Rates in Europe
This paper provides estimates of COVID-19 transmission rates and explains their evolution for selected European countries since the start of the pandemic taking account of changes in voluntary and government-mandated social distancing, incentives to comply, vaccination and the emergence of new variants. Evidence based on panel data modeling indicates that the diversity of outcomes that we document may have resulted from the non-linear interaction of mandated and voluntary social distancing and the economic incentives that governments provided to support isolation. The importance of these ...
Working Paper
Trade Risk and Food Security
We study the role of international trade risk for food security, the patterns of production and trade across sectors, and its implications for policy. We document that food import dependence across countries is associated with higher food insecurity, particularly in low-income countries. We provide causal evidence on the role of trade risk for food security by exploiting the exogeneity of the Ukraine-Russia war as a major trade disruption limiting access to imports of critical food products. Using micro-level data from Ethiopia, we empirically show that districts relatively more exposed to ...
Working Paper
The Rise of Exporting By U.S. Firms
Although a great deal of ink has been spilled over the consequences of globalization, we do not yet fully understand the causes of increased worldwide trade. Using confidential microdata from the U.S. Census, we document widespread entry into countries abroad by U.S. firms from 1987 to 2006. We show that this extensive margin growth is unlikely to have been due to significant declines in entry costs. We instead find evidence of large roles for the development of the internet, trade agreements, and foreign income growth in driving these trends.
Working Paper
Trade Costs and Inflation Dynamics
We study how trade cost shocks influence inflation. Using bilateral trade flows from detailed global input-output data and a gravity framework, we estimate trade cost shocks and their effects on CPI inflation. Higher trade costs for final goods cause large but short-lived inflation spikes, while increased costs for intermediate inputs trigger more persistent inflation. A multi-country model of inflation with trade in final goods and intermediate inputs replicates these patterns. We show that trade cost shocks and tariffs on imported inputs transmit through global value chains and worsen ...