Saltwater intrusion in coastal aquifers is one of the main causes of groundwater quality degradation. These intrusions are often due to excessive withdrawals in sensitive parts of coastal aquifers. The scope of this paper is to identify specific problems set by optimal management of such a...

[fre] Les problèmes d'intrusion d'eau salée dans les aquiferes côtiers constituent aujourd'hui l'une des principales causes de détérioration de la qualité de leurs eaux. L'eau de mer, plus dense que l'eau douce, envahit ces aquiferes dès que les prélèvements sont suffisamment intenses...

This paper provides a framework that aims at distinguishing the technological economies of vertical integration from the vertical economies resulting from market imperfections. To illustrate our analyze, we use consistent panel data econometric methods to estimate cost functions on a sample of...