For decades, climate economists and policymakers have favored market-driven solutions with minimal government intervention, advocating carbon pricing as the primary climate policy instrument. The Inflation Reduction Act (IRA), enacted in 2022, represents a fundamental departure from this...

Despite decades of global attention, effective climate policy implementation remains challenging, with firms and investors often grappling with uncertainty about potential policymaking in addition to actual policy changes. This paper introduces a novel Climate Policy Uncertainty (CPU) index,...

This paper formalizes the geopolitical externality of climate policy and estimates its plausible magnitudes. Specifically, domestic reductions in fossil fuel demand depress global prices, thereby lowering export revenues for resource-rich autocracies - many of which allocate substantial...

We assess how changes in the scientific consensus around equilibrium climate sensitivity (ECS), as captured by the IPCC’s Fifth (AR5) and Sixth (AR6) Assessment Reports, impact policymakers’ willingness to take climate action. Taking the IPCC’s reports at face value, the ECS estimates in...

In the discussions being held at EU level about the 2040 mitigation target, the role of international credits has recently taken centre stage. The new momentum in those discussions is due in part to the German government having announced its support for a mitigation target of a net 90 per cent...

Growing North-South tensions are impeding global climate cooperation and hampering Germany’s search for reliable partners. Brazil is a key actor with the potential to alleviate tensions: it sees itself as a bridge-builder and will host the Climate Change Conference in 2025 (COP30). Under their...

We study the effectiveness of climate change mitigation policies in reducing carbon emissions, focusing on the channel of economy-wide energy efficiency. Using U.S. data, we estimate impulse response functions (IRFs) that characterize how energy efficiency responds to energy price shocks....

A plethora of sustainable finance taxonomies are emerging worldwide to support shifting trillions for climate action. Employing a qualitative research approach, we use document analysis to assess 26 sustainable finance taxonomy frameworks worldwide that are in the developing phase or have been...

Industrial policies greening the economy aim to accelerate the transition to net zero. We show that the United States (US) Inflation Reduction Act improved the supply of climate finance globally. Using granular data on global investment funds, we identify a novel international spillover channel...

Sustainable finance taxonomies such as the European Union (EU) taxonomy can support the transition to a climate-neutral economy. As a classification system, these taxonomies serve to offer transparency and guidance as to how capital flows can be shifted to sustainable and...

Does a shift to ambitious climate policy increase financial fragility? In this paper, we develop a quantitative macroeconomic model with carbon taxes and endogenous financial crises to study such "Climate Minsky Moments". By reducing asset returns, an accelerated transition to net zero exerts...

A global monopoly supplier country of necessary inputs for the provision of global public goods has an incentive to subsidize these exports. The strategic interdependence in the global public good context reverses the "large country" incentives to manipulate the terms-of-trade. It is optimal for...

This paper explores the potential impacts of climate change and mitigation policies on the Euro Area, considering the uncertainty and heterogeneity in both climate and economic systems. Using the MATRIX model, a multi-sector and multi-agent macroeconomic model, we simulate various climate...

Climate policy in the European Union (EU) and Germany changed significantly with the adoption of net-zero emissions targets. A key new development is the growing importance of carbon management. The umbrella term includes not only the capture and storage of CO2 (carbon capture and storage, CCS),...

Steelmaking is one of the two largest industrial contributors to climate change, accounting for 7-9% of global CO2 emissions. To achieve drastic emission reduction in the steel sector, integrating breakthrough low-carbon technologies such as carbon capture and storage (CCS) technology and...

Rising energy prices might lead to adjustments along the supply chain and make firms outsource energy-intensive processes. This could lead to carbon leakage. I provide empirical evidence whether energy price-induced offshoring occurs using firm-level data on energy use, imports, and material...

We construct an overlapping generations model in which the choice between dirty and clean technology hinges on the economy's capital stock, susceptible to climate-induced depreciation. The process of capital accumulation contributes to environmental emissions, yet their intensity can be...

Climate change constitutes one of the major challenges to humankind in the 21st century. To address this crisis, it is necessary to transform the economy and reduce greenhouse gas emissions. The finance industry has the potential to play a central role in this transformation by implementing...

The 27th Conference of the Parties (COP 27) to the United Nations Framework Conven­tion on Climate Change (UNFCCC) in Sharm el-Sheikh, Egypt, was marked by multiple crises and the shaken confidence of developing countries in the multilateral process. Nonetheless, an agreement was reached on the...

Since the 2016 Paris Agreement, countries and companies have been increasingly pressured to adopt appropriate response measures to climate change. However, it is not clear what factors drive firms to undertake climate change actions. Using a correlated random effects panel probit model, this...

This paper studies the relationship between climate policy, market power and innovation. Using data on patenting and firms' balance sheets, I document that firms with a higher degree of market power are, on average, more invested in dirty technologies than their direct competitors. I then...

Europa: • Deutschland muss sich wieder als wichtiger Teil und als eine der Führungsnationen der EU verstehen. Die neue Bundesregierung sollte in außenwirtschaftlichen Fragen konsequent europäisch denken und handeln. • Nur ein starker EU-Binnenmarkt schafft Augenhöhe mit den USA und...

Europe: • Germany must once again see itself as an important part of and a leading nation within the EU. The new German government should consistently think and act in a European way on foreign trade issues. • Only a strong EU single market can compete on equal terms with the USA and China....

This study aims to examine the causal relationship between climate policy and spatial development inequality within cities. To this end, we leverage the temporal and spatial variations in the implementation of the low-carbon city pilot initiative (LCCPI) to perform a staggered...

Mit der Wiederwahl von Donald Trump zum US-Präsidenten steht die amerikanische Energie- und Klimapolitik erneut vor einem fundamentalen Einschnitt. Während Trumps Vorgänger Joe Biden mit Investitionsprogrammen wie dem Inflation Reduction Act den klimafreundlichen Umbau der Wirtschaft...

In July 2021, severe floods devastated parts of Germany, causing numerous casualties and extensive damage to property and infrastructure. As climate change is expected to increase the frequency and severity of such extreme weather events, understanding their social implications is crucial. Using...

The transition to a renewable heating system poses extraordinary policy challenges to societies in Europe and beyond. Many buildings are heated decentrally, which makes broad public acceptance essential. As governments may be held responsible for perceived policy impacts on individuals,...

We examine the impact of a carbon tax on consumer choices via a large-scale online randomized controlled trial. Higher taxes generally reduce the demand for high-carbon goods. Compared to an import tax, a carbon tax reduces demand when the tax is zero (i.e., announced but not levied) but leads...

We assess how changes in the scientific consensus around equilibrium climate sensitivity (ECS), as captured by the IPCC's Fifth (AR5) and Sixth (AR6) Assessment Reports, impact policymakers' willingness to take climate action. Taking the IPCC's reports at face value, the ECS estimates in AR6...

This paper formalizes the geopolitical externality of climate policy and estimates its plausible magnitudes. Specifically, domestic reductions in fossil fuel demand depress global prices, thereby lowering export revenues for resource-rich autocracies - many of which allocate substantial...

European climate policy was traditionally pursued in the expectation of global policy convergence, ensuring equal opportunities for domestic and foreign firms in achieving climate neutrality. However, increasing geopolitical fragmentation has disrupted this expectation. Across the globe,...

Mit diesem Artikel stellen wir eine Ordnungskonzeption zur Diskussion, die spezifische Ideen zur Klimagerechtigkeit, Klima-Governance und Klimapolitik integrativ miteinander verbindet. Wir beginnen mit dem Problem, dass ein verbindliches Abkommen zur globalen Bepreisung von Kohlenstoff auf...

Despite decades of global attention, effective climate policy implementation remains challenging, with firms and investors often grappling with uncertainty about potential policymaking in addition to actual policy changes. This paper introduces a novel Climate Policy Uncertainty (CPU) index,...

When environmental regulations are unpopular, policymakers often attribute resistance to information frictions and poor communication. We test this idea in the context of a major climate policy: Germany's Heating Law of 2023, which mandates the phase-out of fossil fuel heating. Through a survey...