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We develop a two-sector incomplete markets integrated assessment model to analyze the effectiveness of green quantitative easing (QE) in complementing fiscal policies for climate change mitigation. We model green QE through an outstanding stock of private assets held by a monetary authority and its portfolio allocation between a clean and a dirty sector of production. Green QE leads to a partial crowding out of private capital in the green sector and to a modest reduction of the global temperature by 0.04 degrees of Celsius until 2100. A moderate global carbon tax of 50 USD per tonne of carbon is 4 times more effective.
Climate risk has become a major concern for financial institutions and financial markets. Yet, climate policy is still in its infancy and contributes to increased uncertainty. For example, the lack of a sufficiently high carbon price and the variety of definitions for green activities lower the value of existing and new capital, and complicate risk management. This column argues that it would be welfare-enhancing if policy changes were to follow a predictable longer-term path. Accordingly, the authors suggest a role for financial regulation in the transition.
Climate crimes – a critique
(2023)
This paper aims on taking a critical approach to the emerging debate on climate criminal justice, that is mostly about something labeled „climate criminal law“ („Klimastrafrecht“). The critique is directed at climate crimes intended to protect our habitable climate („Klimaschutzstrafrecht“) or to prevent climate change („Klimawandelpräventionsstrafrecht“) staged as transformational criminal law. “Fighting" climate change with climate crimes can lull us into deceptive certainties and by extension into perilous idleness; and it will do so if we think of climate protection essentially in terms of traditional criminal law. Climate crimes are based on the idea that we can counter climate change with the "sharpest sword" available to a polity (cf. the German and Continental European ultima-ratio principle) and that we can thereby also get hold of "the powerful". But these certainties rest on but normative (and at heart: liberal) doctrines, which are deceptive in having lost touch with the realities of the administration of criminal justice. They obscure that more effective measures are available to mitigate the climate crisis and that "the powerful" will likely be shielded with and by climate crimes. Therefore, the climate crimes approach to the climate crisis may just turn out to be (self-)appeasement. It obfuscates that more effective measures are likely necessary to avert impending crises. Our critique is therefore not "only" directed at the symbolic, but the dysfunctional and "dark side" of climate crimes.
We raise some critical points against a naïve interpretation of “green finance” products and strategies. These critical insights are the background against which we take a closer look at instruments and policies that might allow green finance to become more impactful. In particular, we focus on the role of a taxonomy and investor activism. We also describe the interaction of government policies with green finance practice – an aspect, which has been mostly neglected in policy debates but needs to be taken into account. Finally, the special case of green government bonds is discussed.
We raise some critical points against a naïve interpretation of “green finance” products and strategies. These critical insights are the background against which we take a closer look at instruments and policies that might allow green finance to become more impactful. In particular, we focus on the role of a taxonomy and investor activism. We also describe the interaction of government policies with green finance practice – an aspect, which has been mostly neglected in policy debates but needs to be taken into account. Finally, the special case of green government bonds is discussed.