This volume brings forth a set of papers presented at the conference on "Varia- tional Inequalities and network equilibrium problems," held in Erice at the "G. Stam- pacchia" School of the "E. Majorana" Centre for Scientific Culture in the period 19 25 June 1994. The meeting was conceived to contribute to the exchange between Variational Analysis and equilibrium problems, especially those related to network design. Most of the approaches and viewpoints of these fields are present in the volume, both as concerns the theory and the applications of equilibrium problems to transportation,...