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Net national product, wealth, and social well-being

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  • DASGUPTA, PARTHA
  • M LER, KARL-G RAN
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    Abstract

    This paper is about net national product (NNP). We are concerned with what NNP means, what it should include, what it offers us and, therefore, why we may be interested in it. We show that NNP, properly defined, can be used to evaluate economic policies, but we also show that it should not be used in any of its more customary roles, such as in making intertemporal and cross-country comparisons of social well-being. We develop such indices as would be appropriate for making those comparisons. In particular, we show that welfare comparisons should involve comparisons of wealth. Writings on the welfare economics of NNP have mostly addressed economies pursuing optimal policies, and are thus of limited use. Our analysis generalises this substantially by studying economies whose governments are capable of engaging only in policy reforms. We show how linear indices can be used for the evaluation of policy reform even in the presence of non-convexities in the economic environment. The analysis pertinent for optimising governments are special limiting cases of the one we develop.The literature on green NNP has widely interpreted NNP as constant-equivalent consumption . We show that this interpretation is wrong. It is the Hamiltonian that equals constant-equivalent utility. Since both theory and empirics imply that the Hamiltonian is a non-linear function of consumption and leisure, the Hamiltonian should not be confused with NNP.

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    Bibliographic Info

    Article provided by Cambridge University Press in its journal Environment and Development Economics.

    Volume (Year): 5 (2000)
    Issue (Month): 01 (February)
    Pages: 69-93

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    Handle: RePEc:cup:endeec:v:5:y:2000:i:01:p:69-93_00

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