This empirical paper investigates the impact of different sources of increasing returns on firm innovative behaviour in two regions of the UK in the period of the 1990s. We pay particular attention to the impact of intermediate markets such as the market for specialised business services as a...

Altruism or `regard for others' can encourage self-restraint among generators of negative externalities, thereby mitigating the externality problem. We explore how introducing impure altruism into standard regulatory settings alters regulatory prescriptions. We show that the optimal calibration...