Economic theory and empirical models suggest that economic instruments should help us to meet environmental goals at lower cost. Practical experience, however, shows that the cost savings of emission trading are smaller than expected and charges usually have had small incentive impacts. This...

In this paper, we analyse the impact of carbon taxes on emission levels, when niche markets exist for new carbon-free technologies, and when these technologies experience ``learning-by-doing'' effects. For this purpose, a general equilibrium model has been developed, DEMETER, that specifies two...