A portfolio approach to climate investments: CAPM and endogenous risk
Is there a role for investments in climate change mitigation despite low expected return? We use a model of intertemporal expected utility maximisation to analyse this question. Similar to the capital asset pricing model (CAPM) the rate of return depends on the correlation of risk between the return on investments in climate change mitigation and the market portfolio, but in contrast to the classical CAPM we admit the fact that economic and environmental systems are jointly determined, implying that environmental risk is endogenous. Therefore, investments in climate change mitigation may reduce risk via self-protection and self-insurance. If risk reduction is accounted for in cost–benefit evaluations, climate investments may be justified despite low expected return. These aspects of climate investments are not, however, communicated via standard cost–benefit analyses of climate policy. Optimal climate policy may therefore be more ambitious than previously considered. Copyright Springer Science+Business Media, Inc. 2007
Volume (Year): 37 (2007)
Issue (Month): 4 (August)
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- Ehrlich, Isaac & Becker, Gary S, 1972. "Market Insurance, Self-Insurance, and Self-Protection," Journal of Political Economy, University of Chicago Press, vol. 80(4), pages 623-48, July-Aug..
- Marshall, John M, 1976. "Moral Hazard," American Economic Review, American Economic Association, vol. 66(5), pages 880-90, December.
- Richard Howarth & Richard Norgaard, 1993. "Intergenerational transfers and the social discount rate," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 3(4), pages 337-358, August.
- Edward B. Barbier & Jason F. Shogren, 2004. "Growth with Endogenous Risk of Biological Invasion," Economic Inquiry, Western Economic Association International, vol. 42(4), pages 587-601, October.
- Martin L. Weitzman, 2001.
American Economic Review,
American Economic Association, vol. 91(1), pages 260-271, March.
- Martin L. Weitzman, 1998. "Gamma Discounting," Harvard Institute of Economic Research Working Papers 1843, Harvard - Institute of Economic Research.
- R. Mehra & E. Prescott, 2010.
"The equity premium: a puzzle,"
Levine's Working Paper Archive
1401, David K. Levine.
- Anthony Fisher & Urvashi Narain, 2003. "Global Warming, Endogenous Risk, and Irreversibility," Environmental & Resource Economics, European Association of Environmental and Resource Economists, vol. 25(4), pages 395-416, August.
- Breeden, Douglas T., 1979. "An intertemporal asset pricing model with stochastic consumption and investment opportunities," Journal of Financial Economics, Elsevier, vol. 7(3), pages 265-296, September.
- Sandmo, Agnar, 2000. "The Public Economics of the Environment," OUP Catalogue, Oxford University Press, number 9780198297987, March.
- Shogren, Jason F. & Crocker, Thomas D., 1991.
"Risk, Self-Protection, and Ex Ante Economic Value,"
Staff General Research Papers
334, Iowa State University, Department of Economics.
- Jason F. Shogren & Thomas D. Crocker, 1990. "Risk, Self-Protection, and Ex Ante Economic Value," Center for Agricultural and Rural Development (CARD) Publications 90-wp57, Center for Agricultural and Rural Development (CARD) at Iowa State University.
- William F. Sharpe, 1964. "Capital Asset Prices: A Theory Of Market Equilibrium Under Conditions Of Risk," Journal of Finance, American Finance Association, vol. 19(3), pages 425-442, 09.
- Shogren, Jason F. & Crocker, Thomas D., 1999. "Risk and Its Consequences," Journal of Environmental Economics and Management, Elsevier, vol. 37(1), pages 44-51, January.
- Cline, William R, 1991. "Scientific Basis for the Greenhouse Effect," Economic Journal, Royal Economic Society, vol. 101(407), pages 904-19, July.
- Martin Lettau & Sydney Ludvigson, 1999.
"Resurrecting the (C)CAPM: a cross-sectional test when risk premia are time-varying,"
93, Federal Reserve Bank of New York.
- Martin Lettau & Sydney Ludvigson, 2001. "Resurrecting the (C)CAPM: A Cross-Sectional Test When Risk Premia Are Time-Varying," Journal of Political Economy, University of Chicago Press, vol. 109(6), pages 1238-1287, December.
- Richard B. Howarth, 2003. "Discounting and Uncertainty in Climate Change Policy Analysis," Land Economics, University of Wisconsin Press, vol. 79(3), pages 369-381.
- Mark Rubinstein, 1976. "The Valuation of Uncertain Income Streams and the Pricing of Options," Bell Journal of Economics, The RAND Corporation, vol. 7(2), pages 407-425, Autumn.
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