Differentierade marginalkostnader inom järnvägen

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In Sweden, pricing within the rail sector should mainly depart from the principles of marginal pricing. The pricing mechanism should be designed so that the negative external effects are compensatedthrough taxes and charges. Today, the track charges are to some extent differentiated, but it is possible to further differentiate the track charges to achieve a better use of the capacity of the railway and to reach a higher level of efficiency in the sector. In this report, the results from three VTI studies on marginal costs within the railway sector are analysed. These studies focus on the cost categories maintenance, renewals and operation. The aim of this report is to break down the results from these studies into smaller groups in order to get an idea of how the track charges could be further differentiated. The analysis will focus on the marginal costs of track sections and segments.The results shows that it could be problematic to differentiate the estimates intothe smallest fraction track section, as well as some of the minor segments. Some of the smaller track sections and segments have negative marginal costs, since the modelseem to fit poorly where traffic volumes are low. It is also clear that there is a need for a more concentrated focus on the marginal costs analyses, since the three studies analysed here are based on somewhat differing data. For example, it would be interesting to include station data in all three studies

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