%0 Report %A Gries, Thomas %A Naudé, Wim %T Economics for a Safe Operating Space: A Green-Growth-Degrowth Model %D 2025 %8 2025 Sep %I Institute of Labor Economics (IZA) %C Bonn %7 IZA Discussion Paper %N 18110 %U https://www.iza.org/index.php/publications/dp18110 %X We present a model of economic growth that bridges Green Growth and Degrowth perspectives. The model demonstrates that a minimum physical per capita consumption level can be maintained without recourse to tech-optimism, and moreover with degrowth in material resource throughput - respecting planetary boundaries. We critically discuss the assumptions necessary for this result, explore relaxing these, and illustrate that eventually a full transition to renewable energy and materials will be needed to sustain consumption levels in a post-growth economy. We identify areas for future growth modelling, emphasising that these require genuine interdisciplinary cooperation. %K post-growth %K degrowth %K economic growth %K green growth %K sustainability