While some firms build cars or smartphones, Rocket Internet builds companies. The incubator and investment firm has pioneered an extreme approach to new venture creation that is often referred to as a "startup factory:" it rapidly assembles and scales new companies, replicating business models...

The aim of this paper is to develop a spatial model that explicitly incorporates the different types of knowledge spillovers taking place in cities and to show how they affect the migration decision of individuals and the size of cities. We use a static general equilibrium framework with two...