Sustainability and Technical Progress
建立了一个严谨模型，将可持续性、绿色国民生产净值和技术进步三个基本概念联系起来，推导出一般公式，并初步计算表明技术进步残差对长期可持续性估计有显著影响。
A rigorous model connects together the following three basic concepts: (1) “sustainability”— meaning the generalized future power of an economy to consume over time; (2) “Green NNP”— meaning a current measure of national income that subtracts off from GNP not just depreciation of capital but also, more generally, depletion of environmental assets evaluated at current efficiency prices; (3) “technological progress”— meaning a projection onto the future of the so‐called “Solow residual”. A simple general formula is derived. Some crude calculations suggest a possibly strong effect of the residual, which hints that our best present estimates of long‐term sustainability may be largely driven by predictions of future technological progress.