A salient feature of globalization in recent decades is the emergence of "global supply chains" in which different countries specialize in different stages of a sequential production process. In Arnaud Costinot, Jonathan Vogel and Su Wang (2011), CVW hereafter, we have developed a simple theory...

This paper develops an elementary theory of global supply chains. We consider a world economy with an arbitrary number of countries, one factor of production, a continuum of intermediate goods, and one final good. Production of the final good is sequential and subject to mistakes. In the unique...

What is the impact of the minimum wage on the college wage premium? I show that job-ladder models imply that the effect should be small on impact---raising only the wages of workers bound by the minimum wage---and grow over time as workers slowly move up the job ladder. Guided by my theory, I...

I generalize the canonical model--in which relative supply and demand for worker skills shape the skill premium--incorporating monopsony power, minimum wages, and unemployment. I estimate the extended canonical model using national data and, separately, state-level data. I show that...

What are the unequal effects of changes in consumer prices on the cost of living? In the context of changes in import prices, most analyses focus on variation across households in initial expenditure shares on imported goods. However, the unequal welfare effects of non-marginal foreign price...

This paper develops tools and techniques to study the impact of exogenous changes in factor supply and factor demand on factor allocation and factor prices in economies with a large number of goods and factors. The main results of our paper characterize sufficient conditions for robust monotone...

International trade has experienced a Ricardian revival. In this article, we offer a user guide to assignment models, which we will refer to as Ricardo-Roy (R-R) models, that have contributed to this revival

The theory of comparative advantage is at the core of neoclassical trade theory. Yet we know little about its implications for how nations should conduct their trade policy. For example, should import sectors with weaker comparative advantage be protected more? Conversely, should export sectors...

Numerous government policies have attempted to keep workers out of the workplace, on the assumption that this will lower transmission of COVID-19. We test that assumption, measuring the effect of aggregate workplace absence on US COVID deaths at the county level through August. Instrumenting...

In this paper we present and solve a three-stage game of entry, location, and pricing in a spatial price discrimination framework with arbitrarily many heterogeneous firms. We provide a unique characterization of all equilibria without imposing restrictions on the distribution of marginal costs