The Green Fiscal Policy Network is a joint partnership between UN Environment (UNEP), the International Monetary Fund (IMF) and Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) launched in 2011. The Network aims to facilitate knowledge sharing and dialogue on green fiscal policy reforms.

Climatic factors can directly affect economic outcomes such as output, investment and productivity, and understanding the economic consequences of climate change is rapidly becoming a necessity not just for climate economists but also for a wider range of economic professionals involved in modelling and forecasting macroeconomic variables. The focus of this review is on the key theoretical and empirical modelling issues in the analysis of the macroeconomic risks deriving from climate change.

This paper presents a macroeconomic model that combines the economic impact of climate change with the pivotal role of private debt. Using a Stock-Flow Consistent approach based on the Lotka–Volterra logic, we couple its nonlinear monetary dynamics of underemployment and income distribution with abatement costs. A calibration of our model at the scale of the world economy enables us to simulate various planetary scenarios. 

This paper provides a set of analytical tools and best practices to help policy makers understand and manage fiscal risks. Rather than seeking to provide an alternative to standard debt sustainability analysis, the paper’s focus is on how countries can assess and manage fiscal risks more broadly—including tail risks—and to better incorporate uncertainty into fiscal policy analysis. The paper is structured as follows. The next section provides an overview of the scale and nature of fiscal risks, based on a comprehensive survey of 80 countries.

This Policy Brief draws on research carried out at the Grantham Research Institute on Climate Change and the Environment, London School of Economics and Political Science, with the generous financial support of the Global Green Growth Institute (GGGI). It also draws on work by the first author commissioned by the World Bank and published in the World Bank’s policy research working paper series (Bowen, 2012). We are grateful for comments from Dimitri Zenghelis, Tim Foxon and Sheng Fulai.

St. Lucia has been a leader among vulnerable Caribbean states in prioritizing a response to climate change, both nationally and in international fora. Its Nationally Determined Contribution (NDC) outlines a balanced mitigation strategy backed by costed investment plans, and a qualitative adaptation strategy with identified priority sectors. This paper takes stock of St. Lucia’s plans to manage climate change, from the perspective of their macroeconomic implications.

Climate Change Financing Frameworks (CCFFs) provide a structured response to climate change by establishing a framework for managing climate finance and gauging the adequacy and effectiveness of climate-related expenditures. This paper provides a summary of a comparative stock take of work related to CCFFs in the Asia-Pacific Region. UNDP’s Governance of Climate Change Finance Programme (GCCF) led
the Review (see Annex I for more information on GCCF).

Partnership for Action on Green Economy (PAGE) has developed the Integrated Green Economy Modelling (IGEM) framework that aims to better respond to countries’ needs in terms of analysing the cross- sectoral impacts of Green Economy (GE) policies. The IGEM framework presents a methodology on how to integrate three of the main modelling techniques (SD, CGE and IO-SAM) used for green economy policy assessment to refine impact analysis of green policies and investments in the economy. 

This paper develops and operationalizes the Integrated Economic-Environmental Modelling (IEEM) platform which integrates environmental data organized under the first international standard for environmental-economic accounting with a powerful economy-wide modelling approach. IEEM enables the ex-ante economic analysis of public policies and investment on the economy and the environment in a quantitative, comprehensive and consistent framework.