Climatic Change

, Volume 47, Issue 3, pp 283–324 | Cite as

The Greenhouse Externality to Childbearing: A Sensitivity Analysis

  • Brian C. O'Neill
  • Lee Wexler


Externalities to childbearing measurecosts or benefits associated with the birth of a child that fallon society but are not considered in the parents'fertility decisions. Externalities are a key part ofthe theoretical justification for policies that affectfertility behavior. Environmental externalitiespotentially constitute a significant part of the netexternality to childbearing, but few estimates oftheir magnitude have been made. Here we estimate the`greenhouse externality' to childbearing resultingfrom the increased CO2 abatement costs necessitated byan additional birth assuming atmospheric CO2 levelsare eventually stabilized, and examine the sensitivityof the results to a number of factors. We find thatthe greenhouse externality, calculated over the period1995–2100, is generally negative and in most casesranges from several hundred to several thousanddollars per birth. These estimates are most sensitiveto the discount rate and the institutionalarrangements, such as the allowance of emissionstrading, according to which reductions are made. Theyare less sensitive to, although still significantlyaffected by, the stabilization level, the timing ofreductions, future population growth, and theabatement cost function. Estimates of impacts on MDCsand LDCs considered separately demonstrate that theexternality can be truly global, in that effects ofbirths in one region can spill over onto the other. In general, negative externalities rival or, in somecases, greatly exceed estimates of the costs ofaverting births. Investments in fertility-relatedpopulation policies such as voluntary family planningservices and female education are considered desirablein their own right; these results indicate that theycan also be considered likely candidates for costeffective `no-regrets' climate change policy.


Sensitivity Analysis Cost Function Discount Rate Change Policy Abatement Cost 
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Notes and References

  1. 1.
    Lee, R. D. and Miller, T.: 1990, 'Population Policy and Externalities to Childbearing. Annals', AAPSS 510, 17–32; Lee, R. D. and Miller, T.: 1991, 'Population Growth, Externalities to Childbearing, and Fertility Policy in Developing Countries', Proceedings of the World Bank Annual Conference on Development Economics 1990, pp. 275-304.Google Scholar
  2. 2.
    Hardin, G.: 1968, 'The Tragedy of the Commons', Science 162, 1243–1248.Google Scholar
  3. 3.
    Lee, R. D.: 1991, 'Comment: The Second Tragedy of the Commons', in Bernstam, M. and Davis, K. (eds.), Resources, Environment, and Population: Present Knowledge, Future Options, Oxford University Press.Google Scholar
  4. 4.
    Birdsall ('Another Look at Population and Global Warming', 1992, in Population, Environment, and Development, United Nations, New York.) assumes lifetime emissions of 20-60 metric tons of carbon from a typical resident of India or Africa, and a marginal reduction cost of $20/ton based on a scenario in which total emissions are reduced by 10% from a baseline.Google Scholar
  5. 5.
    Cline, W.: 1992, The Economics of Global Warming, Institute for International Economics, Washington, D.C.Google Scholar
  6. 6.
    Wexler, L.: 1996, The Greenhouse Externality to Childbearing, Unpublished Manuscript, International Institute for Applied Systems Analysis; Wexler, L.: 1995, Population Growth, Global Warming, and the Carbon Externality to Childbearing, Master's Thesis, University of California, Berkeley, Energy and Resources Group.Google Scholar
  7. 7.
    Nordhaus, W. D. and Boyer, J.: 1998, What Are the External Costs of More Rapid Population Growth?, Theoretical Issues and Empirical Estimates, Paper Presented at the 150th Anniversary Meeting of the American Association for the Advancement of Science, Philadelphia, February 15.Google Scholar
  8. 8.
    Roughgarden, T. and Schneider, S. H.: 1999, 'Climate Change Policy: Quantifying Uncertainties for Damages and Optimal Carbon Taxes', Energy Policy 27, 415–429.Google Scholar
  9. 9.
    U.S. National Research Council: 1986, Population Growth and Economic Development: Policy Questions, National Academy Press, Washington, D.C.Google Scholar
  10. 10.
    Pepper, W. et al.: 1992, Emissions Scenarios for the IPCC: An Update: Assumptions, Methodology, and Results, Prepared for IPCC Working Group I, U.S. EPA.Google Scholar
  11. 11.
    Lutz et al.: 1996, The Future Population of the World: What Can We Assume Today?, Earthscan.Google Scholar
  12. 12.
    Wigley, T.M. L., Jain, A. K., Joos, F., Nyenzi, B. S., and Shukla, P. R.: 1997, Implications of Proposed CO 2 Emissions Limitations, Intergovernmental Panel on Climate Change (IPCC), Technical Paper 4, IPCC.Google Scholar
  13. 13.
    Wigley, T.M. L., Richels, R., and Edmonds, J. A.: 1996, 'Economic and Environmental Choices in the Stabilization of Atmospheric CO2 Concentrations', Nature 379, 240–243.Google Scholar
  14. 18.
    Schimel, D. et al.: 1996, 'Radiative Forcing of Climate Change', in Houghton, J. T. et al. (eds.), Climate Change 1995: The Science of Climate Change, Cambridge University Press, Cambridge.Google Scholar
  15. 19.
    Wigley, T. M. L.: 1997, 'Implications of Recent CO2 Emission-Limitation Proposals for Stabilization of Atmospheric Concentrations', Nature 390, 267–270.Google Scholar
  16. 20.
    United Nations: 1998, World Population Projections to 2150, wdtrends/execsum.htmGoogle Scholar
  17. 22.
    Schelling, T.: 1995, 'Intergenerational Discounting', Energy Policy 23, 395–401; Lind, R.: 1994, 'Intergenerational Equity, Discounting, and the Role of Cost-Benefit Analysis in Evaluating Global Climate Policy', in Nakicenovic, N., Nordhaus, W. D., Richels, R., and Toth, F. L. (eds.), Integrative Assessment of Mitigation, Impacts, and Adaptation to Climate Change, pp. 447-466. International Institute for Applied Systems Analysis, Austria; Arrow, K. J., Cline, W. R., Maler, K-G., Munasinghe, M., Squitieri, R., and Stiglitz, J. E.: 1996, 'Intertemporal Equity, Discounting, and Economic Efficiency', in Bruce, J. P., Lee, H., and Haites, E. F. (eds.), Climate Change 1995: The Economic and Social Dimensions of Climate Change, Cambridge University Press, Cambridge, pp. 125-144.Google Scholar
  18. 23.
    Hourcade, J. C.: 1996, 'Estimating the Costs of Mitigating Greenhouse Gases', in Bruce, J. P., Lee, H., and Haites, E. F. (eds.), Climate Change 1995: The Economic and Social Dimensions of Climate Change, Cambridge University Press, Cambridge, pp. 263–296.Google Scholar
  19. 24.
    Grubb, M.: 1997, 'Technologies, Energy Systems and the Timing of CO2 Emissions Abatement: An Overview of Economic Issues', Energy Policy 25, 159–172.Google Scholar
  20. 27.
    For example, see Azar, C. and Sterner, T.: 1996, 'Discounting and Distributional Considerations in the Context of Global Warming', Ecol. Econ. 19, 169–184.Google Scholar
  21. 28.
    Chomitz, K. M. and Birdsall, N.: 1991, 'Incentives for Small Families: Concepts and Issues', in Proceedings of the World Bank Annual Conference on Development Economics, 1990, World Bank, Washington, D.C., pp. 309–349.Google Scholar
  22. 29.
    Cochrane, S. H. and Sai, F. T.: 1991, Health Sector Priorities Review: Excess Fertility, The World Bank, Population, Health, and Nutrition Division, Washington, D.C.; Summers, L. H.: 1992, Investing in All the People, Paper Prepared for the QuadiAzam Lecture at the Eighth Annual General Meeting of the Pakistan Society of Development Economists, Islamabad, December.Google Scholar
  23. 30.
    Henshaw, S. K.: 1998, 'Unintended Pregnancy in the United States', Family Planning Perspectives 30, 24–29, 46; Brown, H. S. and Eisenberg, H. L. (eds.): 1995, The Best Intentions: Unintended Pregnancy and the Wellbeing of Children and Families, National Academy Press, Washington, D.C.Google Scholar
  24. 31.
    Bongaarts, J., O'Neill, B. C., and Gaffin, S. R.: 1997, 'Global Warming Policy: Population Left Out in the Cold', Environment 39, 40–41; O'Neill, B. C., MacKellar, F. L., and Lutz, W.: 2000, Population and Climate Change, Cambridge University Press.Google Scholar
  25. 32.
    Becker, G. S.: 1991, A Treatise on the Family, Harvard University Press, Cambridge, MA.Google Scholar
  26. 33.
    Dasgupta, P.: 1987, 'The Ethical Foundations of Population Policies', in Johnson, D. G. and Lee, R. (eds.), Population Growth and Economic Development: Issues and Evidence, The University of Wisconsin Press, Madison, WI, pp. 631–659. Ng, Y.-K: 1986, 'On the Welfare Economics of Population Control', Population Develop. Rev. 12, 247-266. Parfit, D.: 1984, Reasons and Persons, Oxford University Press, Oxford.Google Scholar
  27. 34.
    Wexler, L.: 1996, Improving Population Assumptions in Greenhouse Gas Emissions Models, Working Paper WP-96-99, International Institute for Applied Systems Analysis.Google Scholar
  28. 35.
    Nordhaus, W. D.: 1996, 'A Regional Dynamic General-Equilibrium Model of Alternative Climate-Change Strategies', Amer. Econ. Rev. 86, 741–765.Google Scholar

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Brian C. O'Neill
    • 1
  • Lee Wexler
    • 2
  1. 1.Watson Institute for International Studies and Center for EnvironmentalStudiesBrown UniversityProvidenceU.S.A.
  2. 2.International Institute for Applied Systems AnalysisLaxenburgAustria

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