Integrating Climate Adaptation and Natural Capital Into Macroeconomic Frameworks and Debt Sustainability

The International Monetary Fund’s (IMF) macroeconomic frameworks are falling short in addressing climate and nature-related factors, leading to misaligned policy advice and investment strategies for the global south. This is a key finding of a consultation paper by system change consultancy Systemiq.

Despite recent IMF updates to its debt sustainability analyses (DSA), the paper argues that more comprehensive changes are needed to prevent these changes inadvertently worsening debt unsustainability in climate-vulnerable economies.

The paper proposes technical reforms to the IMF’s growth projection frameworks and DSA to more accurately account for adaptation investments, natural capital stock, and climate and nature risks. These changes, the authors suggest, would enable countries to make more informed investment decisions, fostering sustainable economic growth.

The authors – Guido Schmidt-Traub, Veerle Haagh and Rad Sappany – outline several critical gaps in the recently updated framework.

A key concern is the exclusion of climate change and nature degradation impacts in GDP growth forecasts, which the authors deem “unrealistic” given the world is already experiencing tangible climate impacts.

Over the past two decades, climate-vulnerable emerging markets and developing economies have lost one-fifth of their collective GDP to extreme weather events, say the authors. Small island developing states have been particularly hard hit, losing 8.2% of GDP annually to climate disasters.

Yet the IMF’s current framework overlooks how investments in restoring natural capital can boost climate resilience, productivity and growth. It often counts short-term GDP gains from natural capital destruction – such as deforestation – as debt solutions without considering the associated costs to livelihoods or long-term economic sustainability.

This misalignment stems from the fact that the IMF’s current methodologies do not adequately account for the productive value provided by natural capital stocks.

As a result, the ”business as usual” approach is a threat to vital ecosystem services, such as agriculture and storm protection. Ongoing environmental degradation is undermining natural capital stocks like mangroves which act as carbon sinks and protect against rising sea levels at a lower cost than building concrete seawalls.

This pattern exacerbates the impact of climate disasters on communities, potentially leading to abrupt declines in ecosystem services, increased GDP volatility and diminished long-term growth potential.

To address these shortcomings, the paper proposes three key reforms.

1. Expand IMF GDP growth forecasts and macroeconomic programming to include climate and nature risks, the mitigating impact of related investments and policies, and natural capital as productive capital.
2. Broaden alternative scenarios and stress tests used in DSA of low-income countries to incorporate nature risks and investments, consider natural capital’s role in adaptation and ensure consistent implementation.
3. Revise the framework for market-access countries to align with advice for low-income countries.

The report includes a detailed technical explanation on how these reforms can be implemented using existing data and models.

The authors emphasise that these adjustments must be part of a broader political strategy to ensure climate-vulnerable nations can access financing for resilience investments without exacerbating debt burdens.