This paper investigates the role of firm heterogeneity in environmentally extended new trade models, contrasting Eaton-Kortum and Melitz models to Armington and Krugman models. We show that when emissions per sales are constant across firms -- a standard assumption in the literature -- all four...

Trade agreements are powerful drivers of global economic integration, leading to increased trade flows between countries. Usually, trade agreements are extensive documents with hundreds of provisions and different levels of enforceability. Are all these provisions useful, even those that are...

This paper investigates the elusive role of productivity heterogeneity in new trade models in the trade and environment nexus. We contrast the Eaton-Kortum and the Melitz models with firm heterogeneity to the Armington and Krugman models without heterogeneity. We show that if firms have a...