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Directed technical change, environmental sustainability, and population growth

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  • Kruse-Andersen, Peter Kjær

Abstract

Population growth has two potentially counteracting effects on pollution emissions: (i) more people imply more production and thereby more emissions, and (ii) more people imply a larger research capacity which might reduce the emission intensity of production, depending on the direction of research. This study investigates how to achieve a given climate goal in the presence of these two effects. A growth model featuring both directed technical change and population growth is developed. The model allows for simultaneous research in polluting and non-polluting technologies. Both analytical and numerical results indicate that population growth is a burden on the environment, even when all research efforts are directed toward non-polluting technologies. Thus, research subsidies alone cannot ensure environmental sustainability. Instead, the analysis highlights the importance of carbon taxes for climate change mitigation.

Suggested Citation

  • Kruse-Andersen, Peter Kjær, 2023. "Directed technical change, environmental sustainability, and population growth," Journal of Environmental Economics and Management, Elsevier, vol. 122(C).
    • Handle: RePEc:eee:jeeman:v:122:y:2023:i:c:s0095069623001031
    DOI: 10.1016/j.jeem.2023.102885
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    Keywords

    Directed technical change; Endogenous growth; Environmental policy; Environmental sustainability; Climate change; Population growth;
    All these keywords.

    JEL classification:

    • J11 - Labor and Demographic Economics - - Demographic Economics - - - Demographic Trends, Macroeconomic Effects, and Forecasts
    • O30 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - General
    • O41 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - One, Two, and Multisector Growth Models
    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming
    • Q55 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Technological Innovation
    • Q58 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Government Policy

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