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Working Paper
Market Size and Trade in Medical Services
We measure the importance of increasing returns to scale and trade in medical services. Using Medicare claims data, we document that “imported” medical care—services produced by a medical provider in a different region—constitute about one-fifth of US healthcare consumption. Larger regions specialize in producing less common procedures, which are traded more. These patterns reflect economies of scale: larger regions produce higher-quality services because they serve more patients. Because of increasing returns and trade costs, policies to improve access to care face a ...
Working Paper
International Technology Licensing, Intellectual Property Rights, and Tax Havens
This paper investigates the determinants of international technology licensing using data for 50 countries during 1996-2012. A multi-country model of innovation and international technology licensing yields a dynamic structural gravity equation for royalty payments as a function of fundamentals, including imperfect intellectual property protection and differences in corporate taxation. The gravity equation is estimated with nonlinear methods. The model's fundamentals account for about 60% of the variation in royalty payments. A quantitative analysis sheds light on the impact of global ...
Working Paper
History and the sizes of cities
We contrast evidence of urban path dependence with efforts to analyze calibrated models of city sizes. Recent evidence of persistent city sizes following the obsolescence of historical advantages suggests that path dependence cannot be understood as the medium-run effect of legacy capital but instead as the long-run effect of equilibrium selection. In contrast, a different, recent literature uses stylized models in which fundamentals uniquely determine city size. We show that a commonly used model is inconsistent with evidence of long-run persistence in city sizes and propose several ...
Working Paper
The few leading the many: foreign affiliates and business cycle comovement
This paper uses microdata on balance sheets, trade, and the nationality of ownership of firms in France to investigate the effect of foreign multinationals on business cycle comovement. We first show that foreign affiliates, which represent a tiny fraction of all firms, are responsible for a high share of employment, value added, and trade both at the national and at the regional levels. We also show that the distribution of foreign affiliates across regions differs with the nationality of the parent. We then show that foreign affiliates increase the comovement of activities between their ...
Working Paper
Firms in international trade
Firms play a critical role in the global economy. In this paper, we survey the behavior of firms in the international economy, both in theory and in the data. We first summarize the key empirical facts that motivate the study of firms in trade. Then, we detail recent theoretical developments on the micro-foundations of firm behavior in an international context, focusing on how firms select into exporting, and how firms respond to international shocks. Finally, we turn to a ?real world,? empirically focused view of exporting, beginning with the growth dynamics of firms expanding to global ...
Working Paper
Value Added and Productivity Linkages Across Countries
What is the relationship between international trade and business cycle synchronization? Using data from 40 countries, we find that GDP comovement is significantly associated with trade in intermediate inputs but not with trade in final goods. Motivated by this new fact, we build a model of international trade that is able to replicate the empirical trade-comovement slope, offering the first quantitative solution for the Trade Comovement Puzzle. The model relies on (i) global value chains, (ii) price distortions due to monopolistic competition and (iii) fluctuations in the mass of firms ...
Working Paper
International Technology Licensing, Intellectual Property Rights, and Tax Havens
This paper investigates the determinants of international technology licensing using data for 41 countries during 1996-2012. A multi-country model of innovation and international technology licensing yields a dynamic structural gravity equation for royalty payments as a function of fundamentals, including: (i) imperfect intellectual property protection and (ii) tax havens. The gravity equation is estimated using nonlinear methods. The model’s fundamentals account for 56% of the variation in royalty payments. Counterfactual analysis sheds light on the role of intellectual property rights ...
Working Paper
The Trade Comovement Puzzle and the Margins of International Trade
Countries that trade more with each other tend to have more correlated business cycles. Yet, traditional international business cycle models predict a much weaker link between trade and business cycle comovement. We propose that fluctuations in the number of varieties embedded in trade flows may drive the observed comovement by increasing the correlation among trading partners? total factor productivity (TFP). Our hypothesis is that business cycles should be more correlated between countries that trade a wider variety of goods. We find empirical support for this hypothesis. After decomposing ...
Report
The Opportunity Costs of Entrepreneurs in International Trade
We show that a trade model with an exogenous set of heterogeneous firms with fixed operating costs has the same aggregate outcomes as a span-of-control model. Fixed costs in the heterogeneous-firm model are entrepreneurs' forgone wage in the span-of-control model.
Working Paper
What Drives International technology Diffusion? A Gravity Approach
We derive a theory-based gravity-type equation that determines the main drivers of international technology diffusion under perfect enforcement of intellectual property rights. We estimate the gravity equation using bilateral royalty payments data for a sample of 53 countries and the period 1995-2012 to infer the amount of technology diffusion predicted by the model. We then analyze differences between the model and the data, and find that they are mainly driven by characteristics of the importing-technology country that are not captured by the model. We explore the role of three channels: ...