A general two-constraint model of consumer demand
将消费者需求的双约束模型一般化，使效用同时取决于商品消费量和消费时间，并用自采水果农场的实证数据估计需求函数。
We generalise a two-constraint model of consumer demand so as to make utility a function of both consumption of the good and the time allocated to consumption, to accommodate the fact that the consumer may derive utility from the time spent acquiring and/or consuming the good. We use the comparative static results to specify demand systems consistent with this theory and develop an econometric approach to estimate the demand parameters. The model is used to obtain empirical demand functions for customers visiting pick-your-own fruit farms, where customers choose between harvesting fruit themselves and buying pre-harvested fruit on the farm. Oxford University Press and Foundation for the European Review of Agricultural Economics 2010; all rights reserved. For permissions, please email journals.permissions@oxfordjournals.org, Oxford University Press.