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Abstract.  We study how restricting CO2 emissions affects resource prices and depletion over time. We use a Hotelling‐style model with two non‐renewable fossil fuels that differ in their carbon content (e.g., coal and natural gas) and in addition are imperfect substitutes in final good production. We show that an economy facing a CO2 flow‐constraint may substitute towards the relatively dirty input. As the economy tries to maximize output per unit of emissions it is not only carbon content that matters: productivity matters as well. With an announced constraint the economy first substitutes towards the less productive input such that more of the productive input is available when constrained. Preliminary empirical results suggest that it is cost‐effective to substitute away from dirty coal to cleaner oil or gas, but to substitute from natural gas towards the dirtier input oil.

Well-intended policies aimed at reducing greenhouse gas emissions may have unintended undesirable consequences. Recently, a large literature has emerged showing under what conditions this so-called 'Green Paradox' may occur. We review this literature and identify the key mechanisms behind these paradoxical policy outcomes and highlight avenues for future research.

A common critique to the Kyoto Protocol is that the reduction in emissions of CO2 by countries who comply with it will be (partly) offset by the increase in emissions on the part of other countries (carbon leakage). This paper analyzes the effect of technical change on carbon leakage in a two-country model where only one of the countries enforces an exogenous cap on emissions. Climate policy induces changes in relative prices, which cause carbon leakage through a terms-of-trade effect. However, these changes in relative prices in addition affect the incentives to innovate in different sectors. We allow entrepreneurs to choose the sector for which they innovate (directed technical change). This leads to a counterbalancing induced-technology effect, which always reduces carbon leakage. We therefore conclude that the leakage rates reported in the literature so far may be too high, as these estimates neglect the effect of relative price changes on the incentives to innovate.

This paper aims to help policy makers identify how standards can contribute to the effective and cost-efficient development and deployment of eco-innovations (innovations that result in a reduction of environmental impact). To that end we discuss what standards are, how the process of standardization works, and how standards are related to induced innovation and diffusion in different type of markets, e.g. markets for add-on technologies versus markets for integrated resource- or emission-saving technologies. This broad perspective enables us to identify interesting economic dimensions of standards, such as their contribution to positive network externalities, and the extent to which they are substitutes or complements to environmental policy instruments. Finally we discuss how governments might contribute to eco-innovation by selecting, stimulating or creating (inter)national standards.

This paper aims to help policy makers identify how standards can contribute to the effective and cost-efficient development and deployment of eco-innovations (innovations that result in a reduction of environmental impact). To that end we discuss what standards are, how the process of standardization works, and how standards are related to induced innovation and diffusion in different type of markets, e.g. markets for add-on technologies versus markets for integrated resource- or emission-saving technologies. This broad perspective enables us to identify interesting economic dimensions of standards, such as their contribution to positive network externalities, and the extent to which they are substitutes or complements to environmental policy instruments. Finally we discuss how governments might contribute to eco-innovation by selecting, stimulating or creating (inter)national standards.