We use a panel of Brazilian exporters, their products, and destination markets to document a set of regularities for multi-product exporters: (i) few top-selling products account for the bulk of a firm's exports in a market, (ii) the distribution of exporter scope (the number of products per...

This paper develops a theory of firm selection and growth and embeds it into an international trade framework of balanced growth. I assume that firm-level growth is the result of idiosyncratic productivity improvements while there is continuous arrival of new potential producers. Firms can also...

We explore the impact of vertical specialization - trade in goods across multiple stages of production - on the relationship between trade and international business cycle synchronization. We develop a model in which the degree of vertical specialization is endogenously determined by comparative...

We develop a model monopolistic competition model of trade and multinational production (MP). Firms receive an idiosyncratic productivity vector that is specified from a multivariate distribution and they also face distance related trade and MP costs. Thus, individual firms face a...

We develop a theory of staggered adjustment dynamics in a perfect competition model of trade with a continuum of varieties. New technologies for each variety arrive at a constant rate. The consumer consumes a product produced with a certain technology until an exogenous shock arrives. This shock...

much.

One feature of globalization is that countries are increasingly specialized in either innovation or in production. To understand the forces behind this specialization and its welfare consequences, we develop a monopolistic competition model of trade and multinational production (MP) in which...

We explore the implications of models with increasing returns, endogenous variety and firm-level heterogeneity for the quantification of the gains from trade. We first focus on the impact of trade liberalization on imported variety by analyzing the experience of Costa Rica from 1986 to 1992. We...

I develop a new theory of marketing costs and introduce it into a model of trade with product differentiation and firm productivity heterogeneity. In this model, a firm enters a market if it makes profits by reaching a single consumer there and pays an increasing marginal cost to access...