In this paper we propose an economic model for the optimum allocation of water within a given area with the following features. First, the introduction of the institutional, geographical and time scheme under which the water rights are granted. Secondly, the establishment of a modelling...

The aim of this paper is to construct and apply a model for the allocation of water between two competing users, namely irrigation and hydropower. The model is applied in a case study of a specific water system located in North Eastern Spain. Starting with an irrigation-hydropower joint income...

The objective of this paper is to analyse the technological change produced in the Spanish economy between 1980 and 1994 using the Input-Output tables of 1980, 1986, 1990 and 1994. Firstly we obtain and compare the linkage components of each block throughout the period. Secondly, using...

The aim of this paper is to explore the influence of peer behaviour on student marijuana consumption. Our hypothesis is that, in contrast to the traditional measures of peer group effects carried out at class or school level, the use of a closer peer group, which we relate to the group of...