Abstract
Public procurement by competitive tendering is an important part of European policies to encourage competition in network industries previously dominated by public companies. In recent years, the appearance of very low bids has become an issue in several countries. We discuss predatory bidding from a theoretical, practical and legislative point of view. A case of tendering for train services in Sweden is used to illustrate the possibilities to detect an abnormally low bid. An analysis of projected costs and revenues is complemented with a method using historical data on previous tenders. One conclusion is that there is scope for reform in national competition policies in European Union member states concerning multinational enterprises participating in local tenders.