MeasuringIncome and Measuring Sustainability
研究了包容性收入（消费加资本存量净增加值）与瞬时恒定价值收入（保持代际效用现值不变的最大消费）的关系，证明两者相等，为可持续性衡量提供了简便方法。
We examine what interpretation can be given to inclusive income , understood to be consumption plus the value of the net increase in all relevant capital stocks. We introduce the concept of instantaneously constant value income , defined as the maximum amount the economy can consume at a moment of time and keep the expected present value of utility of current and future generations constant. We argue that this income concept captures some of the concerns underlying sustainability. Our main result is that inclusive income equals instantaneously constant value income . We show that this result holds in a very general setting and, in particular, carries over to models incorporating technological progress when such progress can be captured by augmented stocks of knowledge. An important implication of our main result is that it provides a very simple method for deriving inclusive income, which does not involve any linearization of the Hamiltonian.