• Operating costs in Norwegian toll companies: A panel data analysis 

      Amdal, Erik; Bårdsen, Gunnar; Johansen, Kåre; Welde, Morten (Working Paper Series, 1503-299X; 2006:5, Research report, 2006)
      The objective of this paper is to ease the planning of new toll projects by providing estimates of operating costs, and to help us make better informed decisions about the design of the toll collection system. To do so we ...