抄録
This paper proposes a new model for evaluating the environmental impacts of consumption. The new model is developed by integrating existing ones: the waste input-output (WIO) model and one of the economics models describing consumer's behavior. A notable feature of the economics model is that a consumption activity is regarded as the operation of the corresponding consumption “technology.” Because a consumption “technology” produces consumer's utility (or satisfaction) by taking not only goods and services but also time as its inputs, the new model can be used to take account of the so-called rebound effects with regard to both income and time. Applying the developed model to the Japanese data (the WIO table 2000, the household expenditure survey and the survey on time-use), we found that some typical scenarios of alleged sustainable consumption are environmentally sound more than the observed consumption pattern as of 2000.
