The division of labor between and within countries is driven by two fundamental forces, comparative advantage and increasing returns. We set up a simple Ricardian model with a Marshallian input sharing mechanism to study their interplay. The key insight that emerges is that the interaction...

This paper examines the migration and labor mobility in the European Union and elaborates on their importance for the existence of the EU. Against all measures of success, the current public debate seems to suggest that the political consensus that migration is beneficial is broken. This comes...

The last one and a half centuries have witnessed dramatic changes in the world economy. The service (tertiary) sector, which at the beginning of the 20th century was of little importance relative to agriculture and manufacturing, has become the dominant sector today, accounting for 80% and more...

In the popular immigration narrative, migrants leave one country and establish themselves permanently in another, creating a "brain drain" in the sending country. In reality, migration is typically temporary: Workers migrate, find employment, and then return home or move on, often multiple...

The recent EU enlargements into Central and Eastern Europe and increased labor mobility within the Union provide a unique opportunity to evaluate the labor market effects of emigration. Outmigration has contributed to higher wages for stayers, as well as to lower unemployment in the source...

The majority of immigrants stay only temporarily in the host country. When many migrations are temporary, it is important to know who leaves and who stays, and why. The key questions for the host country are whether immigrants are net contributors to the welfare system and whether migrants...

In contrast to what several papers have argued recently, we show that firm heterogeneity fosters agglomeration of economic activity. If firms are more similar with respect to their total factor productivity, each company faces a lower propensity to export. This renders the home market more...

The paper analyzes the impact of skill-biased migration policies under the economics of agglomeration. It therefore develops an agglomeration model with two types of mobile worker who are heterogeneous and differ both within and between skill groups with respect to their migration propensity. On...

The 2004 and 2007 enlargements of the EU extended the freedom of movement to workers from the twelve new member states mainly from Central Eastern Europe. This study summarizes and comparatively evaluates what we know about mobility in an enlarged Europe to date. The pre-enlargement fears of...