In Southern Europe numerous areas suffer water scarcity. For public policies to be effective, a thorough study of water users must be conducted. This paper aims to analyse the key factors that influence the decision of industrial users in urban areas when choosing between withdrawing water from underground sources or using water supplied through the public network. Using a database of industrial firms in Zaragoza (Spain) the proportion of water drawn from wells is considered as the dependent variable of a fractional response model. This methodology provides an original contribution to the field of behavioural analysis of the industrial sector, enabling us to model industrial decisions on water sources. The results obtained show that the most significant decision-drivers are how the industries use the water, the firms’ location and the accessibility of the different sources. Moreover, the findings indicate that firms use lower proportions of well water during the summer.

在南欧，许多地区都缺水。为了使公共政策有效，必须对用水者进行彻底的研究。本文旨在分析在从地下取水或使用通过公共网络提供的水之间进行选择时，影响城市工业用户决策的关键因素。使用西班牙萨拉戈萨的工业公司数据库，从井中抽取的水比例被认为是分数响应模型的因变量。这种方法为工业部门的行为分析领域做出了独特的贡献，使我们能够对水资源的工业决策进行建模。获得的结果表明，最重要的决定因素是行业如何使用水，公司的位置以及不同来源的可及性。此外，研究结果表明，公司在夏季使用的井水比例较低。