Melitz and Ottaviano (2008) predicts a monotonic relation between productivity and markups. When including revenue taxes, however, this relation is non-monotonic and depends on taxes. Even without taxes, productivity and markups can be non-monotonic depending on how non-homotheticity is modeled

This paper argues the widespread adoption of Just-in-Time (JIT) logistics provides a key to understanding the growth in the U.S. trade share. To do so, I develop a dynamic trade model based on the choice of the logistics technology used in a firm's supply chain. The model's predicted trade...