We investigate how variety affects the innovation output of a region. Borrowing arguments from theories of recombinant innovation, we expect that related variety will enhance innovation as related technologies are more easily recombined into a new technology. However, we also expect that...

The paper attempts to interpret a few stylized facts of international economic growth by means of an open economy evolutionary model. The idea is that growth models that incorporate a richer representation of the properties and effects of technological change can give a better explanation of the...