Time use models have been used to estimate the value of leisure - one of the components of the value of travel time savings - usually accepting that sleep duration is an exogenous variable. In this paper, we depart from this belief by considering time asleep as an endogenous decision framed by many elements well documented in the literature which we review using a three-discipline perspective: Social behavior sciences, Medical and health sciences, and Economics. Then we propose a microeconomic model that considers these contributions by capturing four effects: alertness (perception), time use trade-off, performance (productivity) and a series of technical relations linking sleep with other activities and goods consumption. The analytical properties are explored showing that there is a total value of sleep time with different components, that equals the value of leisure; that the value of time assigned to any other activity and the value of leisure increase with sleep time if the person sleeps less than medically recommended; and that the way in which sleep time acts on the value of travel time savings varies according to specific behavioral parameters related with the perception of sleep, work and leisure. A system to estimate behavioral and technical parameters econometrically is proposed.

时间使用模型已被用来估计休闲价值-节省旅行时间的价值之一-通常接受睡眠时间是一个外生变量。在本文中，我们将睡眠时间视为内在的决定，而这一观念是由许多文献中有据可查的要素构成的，我们偏离了这一信念，我们使用三方面的观点对此进行了回顾：社会行为科学，医学和卫生科学以及经济学。然后，我们提出了一个微观经济模型，该模型通过捕获四个影响来考虑这些贡献：警觉性（感知），时间使用权衡，绩效（生产力）以及将睡眠与其他活动和商品消费联系起来的一系列技术关系。探索的分析属性表明，具有不同成分的睡眠时间总价值，等于休闲的价值；如果该人的睡眠时间少于医生的建议，则分配给其他活动的时间值和休闲时间会随着睡眠时间而增加；睡眠时间对节省旅行时间的价值的作用方式会根据与睡眠，工作和休闲感相关的特定行为参数而变化。提出了一种经济计量行为和技术参数的系统。