New railway legislation in Sweden has increased the need for transparent access charges on the Swedish railway network. We estimate cost functions for infrastructure operation, maintenance and renewal in the Swedish national railway network, using unobserved effects models and calculate marginal costs for railway infrastructure wear and tear. We find evidence of unobserved fixed effects at a tr...

I model endogenous horizontal and vertical product differentiation with arbitrarily many heterogeneous firms. Firms are asymmetric in that they differ in their marginal costs. I prove that under an equilibrium refinement, all economically relevant firm outcomes are uniquely determined across all strict subgame perfect Nash equilibria. There are two central results. First, a firm’s price, market...

Deriving a model, where each family member is the producer of his own and other family members' health, shows that the family will not try to equalise marginal benefits and marginal costs of health capital for each family member. They will rather invest in health until the rate of marginal consumption benefits equals the rate of marginal net effective costs of health capital. The level of compe...

A traffic simulation and assignment model is used to compute the social costs of congestion in five English towns, together with potential road charges. The social costs of congestion are measured by the deadweight loss and computed as the area between the marginal social cost and inverse demand curves between the actual and efficient levels of traffic. Potential road charges are computed as th...

in this research the activity of 75 producers, 55 wholesalers and 55 retailers, citrus market of jahrom county was investigated. the results indicated that margin of wholesale, retail and total margin of citrus in this county was 1461.1, 1480.3, and 2941.4 rs respectively. share of producer from marginal price was estimated to be 57.9 percent and share of wholesaler was more than retailer. in t...

Article history: Received 29 June 2013 Received in revised form 18 November 2013 Accepted 19 November 2013 Available online 12 December 2013 Constructing a duopoly model with non-constant marginal costs and a strict Pareto criterion, this paper examines welfare effects of world-price-fixing tariff reductions accompanied by adjustments of a domestic tax. If a destination-based consumption tax is...

Countries with low marginal costs of abating carbon emissions may have high total costs, and vice versa, for a given climate mitigation policy. This may help to explain different countries' policy stances on climate mitigation. We hypothesize that, under a common percentage cut in emissions intensity relative to business as usual (BAU), countries with higher BAU emission intensities have lower ...