For a closed economy with human-made capital, non-renewable resource depletion and (possibly) exogenous, hyperbolic technical progress as explicit-form inputs to a production function, there is a feasible development path that is as if optimal with respect to hyperbolic utility discounting. On this path, typically, welfare-equivalent income wealth-equivalent income Sefton-Weale income net national product, with possibly dramatic differences among these measures; and sustainable income can be greater than, equal to, or less than NNP. For low enough discounting, growing consumption is optimal even when technical progress is zero. A particular discount rate makes all income measures and consumption constant and (except net national product) equal; and zero technical progress then gives the Solow (1974) maximin as a special case. The optimal path is time-consistent because of the way the utility discount rate is chosen to depend on the economy s stocks, and hence on absolute time.
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Volume (Year): 9 (2004) Issue (Month): 04 (August) Pages: 473-484 Download reference. The following formats are available: HTML
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