Economic complexity indicators provide a better understanding of the long-term determinants of countries' economic growth. However, they do not account for intra-national spatial heterogeneity, even when regions, and not only countries, differ tremendously in their productivity. This paper tries...

Empirical evidence has been lacking to explain trade agglomerations over short distances. Starting with a novel micro-database of road freight shipments within Spain for the period 2003-2007, we break down city (municipal) trade flows into the extensive and intensive margins and assess trade...