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Confronting the Kaya Identity with Investment and Capital Stocks

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  • Eric Kemp-Benedict

Abstract

Scaling relations, such as the IPAT equation and the Kaya identity, are useful for quickly gauging the scale of economic, technological, and demographic changes required to reduce environmental impacts and pressures; in the case of the Kaya identity, the environmental pressure is greenhouse gas emissions. However, when considering large-scale economic transformation, as with a shift to a low-carbon economy, the IPAT and Kaya identities and their cousins fail to capture the legacy of existing capital, on the one hand, and the need for new investment, on the other. While detailed models can capture these factors, they do not allow for rapid exploration of widely different alternatives, which is the appeal of the IPAT and Kaya identities. In this paper we present an extended Kaya identity that includes investment and capital stocks. The identity we propose is a sum of terms, rather than a simple scaling relation. Nevertheless, it allows for quick analysis and rapid exploration of a variety of different possible paths toward a low-carbon economy.

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  • Eric Kemp-Benedict, 2011. "Confronting the Kaya Identity with Investment and Capital Stocks," Papers 1112.0758, arXiv.org, revised Jun 2012.
  • Handle: RePEc:arx:papers:1112.0758
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    1. Martínez-Alier, Joan & Pascual, Unai & Vivien, Franck-Dominique & Zaccai, Edwin, 2010. "Sustainable de-growth: Mapping the context, criticisms and future prospects of an emergent paradigm," Ecological Economics, Elsevier, vol. 69(9), pages 1741-1747, July.
    2. van den Bergh, Jeroen C.J.M., 2011. "Environment versus growth -- A criticism of "degrowth" and a plea for "a-growth"," Ecological Economics, Elsevier, vol. 70(5), pages 881-890, March.
    3. Ekins, Paul, 2004. "Step changes for decarbonising the energy system: research needs for renewables, energy efficiency and nuclear power," Energy Policy, Elsevier, vol. 32(17), pages 1891-1904, November.
    4. York, Richard & Rosa, Eugene A. & Dietz, Thomas, 2003. "STIRPAT, IPAT and ImPACT: analytic tools for unpacking the driving forces of environmental impacts," Ecological Economics, Elsevier, vol. 46(3), pages 351-365, October.
    5. Vollebergh, Herman R.J. & Kemfert, Claudia, 2005. "The role of technological change for a sustainable development," Ecological Economics, Elsevier, vol. 54(2-3), pages 133-147, August.
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