NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Sustainable Growth and the Green Golden Rule

Andrea Beltratti, Graciela Chichilnisky, Geoffrey Heal

NBER Working Paper No. 4430
Issued in August 1993

We study a growth model with an environmental asset which is a source of utility and an input to consumption and production. The stock of this asset follows its own ecological dynamics, which are affected by economic activity. We study the implications of an approach to ranking sequences of consumption and environment over time that place weight both on the characteristics of the sequence over any finite period and on its very long run or limiting characteristics. Chichilnisky [5] has called these "sustainable preferences". The criterion shows more intertemporal symmetry than the discounted utilitarian approach. which clearly emphasizes the immediate future at the expense of the long run. In this respect Chichilniskys criterion captures some of the concerns of those who argue for sustainability and for a heightened sense of responsibility to the future. To characterize optimal paths we define the "green golden rule", the path which maximizes long-run sustainable utility from consumption and environment.

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Document Object Identifier (DOI): 10.3386/w4430

Published: Published as "The Green Golden Rule", EL, Vol. 49, no. 2 (1995): 175-179.

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