This paper develops and analyzes a model of international trade comprising multiproduct firms that can produce a range of product varieties distinguished by quality. First, it analyses the within-firm distribution of product quality and argues that firms’ export decisions are sensitive to...

This paper develops a general equilibrium model of multi-product firms and analyzes their behavior during trade liberalization. Firm productivity in a given product is modeled as a combination of firm-level "ability" and firm-product-level "expertise", both of which are stochastic and unknown...

A striking pattern in transaction-level data is the concentration of international shipments in the hands of a few large firms. One common feature of dominating high-performance firms is that they produce multiple products and ship them to many destinations. Motivated by the emergence of highly...

This paper proposes a novel method to estimate productivity and quality at the firm-product level, together with transformation function and demand parameters. The method relies on firm optimization conditions to obtain a one-to-one mapping between observed data and unobserved productivity and...