Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper analyses the diffusion of unleaded petrol in the UK. Changes in the market share of unleaded fuel are the result of changes in the composition of the car stock and changes in the choice of fuel given the car stock. We find that fuel type choices have been mainly driven by changes in tastes and learning as opposed to changes in relative prices induced by fiscal incentives. However car stock composition effects dominate the diffusion process and we find that through this route regulatory changes have made major contributions to changes in the market share of unleaded fuel. Copyright 2000 by Oxford University Press.