布鲁盖尔-No-Green-Growth-Without-Innovation_8页_416kb

Summary of "NO GREEN GROWTH WITHOUT INNOVATION"

Core Content

This document, authored by Philippe Aghion, David Hemous, and Reinhilde Veugelers, argues that green growth is not possible without innovation. It highlights the importance of government intervention in fostering the development and adoption of clean technologies, particularly the so-called backstop technologies that are fully emissions-free. The authors propose a policy framework that combines carbon pricing with R&D subsidies to effectively drive the transition to a sustainable economy.

Main Viewpoints

• Green growth is not just about reducing emissions, but also about ensuring that the transition to clean technologies is economically viable and does not stifle growth.
• Current approaches to green growth are oversimplified, often ignoring the innovation factor. This leads to potential misjudgments in the timing and methods of policy intervention.
• Directed technological change is necessary, where government policies actively steer innovation towards clean technologies.
• Delaying intervention is costly, both in terms of environmental degradation and lost economic growth.
• Combining carbon pricing and R&D subsidies is more effective than using either instrument alone, as it reduces short-term costs and accelerates the adoption of clean technologies.
• Developed countries have a key role in leading the way and enabling the diffusion of clean technologies to less-developed nations.
• Global coordination is essential to prevent carbon leakage and ensure equitable climate change mitigation.

Key Information

The Role of Innovation in Green Growth

• The availability of future technologies depends on current innovation efforts.
• Backstop technologies, which are fully emissions-free, are not yet available or close to the market.
• The green innovation machine needs to be activated by government policies to ensure the emergence of these technologies.

Policy Instruments

• Carbon pricing is essential but insufficient on its own.
• R&D subsidies are necessary to stimulate innovation in clean technologies.
• A combination of both instruments is more effective, as it reduces short-term consumption losses and encourages long-term growth.

The Cost of Delay

• Delaying intervention leads to increased environmental degradation and higher long-term costs.
• The cost of delay is more significant when the discount rate is higher, as it reflects a lower value placed on the future.
• Box 1 shows that the cost of delaying action increases over time, especially when the innovation gap widens.

The Importance of Global Coordination

• Unilateral action by developed countries can trigger green innovation in the North, which can then be adopted by the South.
• Technology transfer and capacity building in developing countries are crucial for global climate change mitigation.
• Carbon tariffs can be used to encourage other countries to adopt similar policies, but only if they are credible and well-designed.

The AABH Model vs. the Standard Model

• The standard model (Nordhaus) assumes exogenous productivity growth and externalities from environmental degradation.
• The AABH model emphasizes endogenous innovation and the interplay between environmental policy and technological change.
• The AABH model shows that delaying intervention can lead to suboptimal outcomes and longer periods of environmental damage.

Current Climate Policy Assessment

• Carbon prices in the EU are low, volatile, and unpredictable, which hinders green innovation.
• Public R&D spending on green technologies is limited and uncoordinated, particularly in the US.
• Technology transfer to developing countries is insufficient, with limited projects under the Clean Development Mechanism (CDM).

Recommendations for the EU

1. Set a high and predictable carbon price to incentivize innovation and reduce emissions.
2. Subsidize the diffusion of existing green technologies and increase public funding for R&D, especially for radical backstop technologies.
3. Coordinate green regulations and public procurement across EU member states to create a large, integrated market for green investments.
4. Act globally by developing an international roadmap for a consistent and innovation-inducing carbon price.
5. Promote technology transfer and capacity building in developing countries to ensure equitable climate action.

Conclusion

• The transition to green growth requires strategic government intervention to drive innovation and manage the trade-off between growth and sustainability.
• Policy design must consider the dual challenges of environmental externalities and innovation dynamics.
• The AABH model provides a new framework for understanding and addressing climate change through policy coordination and technology development.

References

• Acemoglu, D., Aghion, P., Bursztyn, L., and Hemous, D. (2009) The environment and directed technological change.
• Aghion, P., Veugelers, R., and Serre, C. (2009) Cold start for the green innovation machine.
• Nordhaus, W. and Boyer, J. (2000) Warming the world: economic modeling of global warming.
• Stern, N. (2007) The economics of climate change: the Stern Review.

This summary encapsulates the key arguments and recommendations from the document, highlighting the interconnectedness of innovation and climate policy.