Labour shortages have become prevalent across advanced economies. Yet, little is known about which firms are more likely to face them and the impact they have on the labour market. We create a firm-level data set spanning 28 EU countries, 283 regions and 18 sectors, contributing to close this...

"This paper proposes a simple theory of a system of cities that decomposes the determinants of the city size distribution into three main components: efficiency, amenities, and frictions. Higher efficiency and better amenities lead to larger cities, but also to greater frictions through...