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Abstract:
This paper studies the relevance of strategic trade effects in the environmental policy for the European electricity sector. The production, investment and trade of electricity are modelled for four European countries. Three market regimes are distinguished: perfect competition, price regulation and Cournot competition. The model is used to examine the effect of the degree of competition on the state of the environment and to study the strategic trade effects of unilateral environmental policies.

Electricity, Trade and the Environment

Abstract:
In the course of 2006, Gazprom sharply increased gas prices for Ukraine, Belarus, Georgia and Moldova. This paper assesses (i) to what extent Europe is vulnerable to similar use of market power by Russia, and (ii) to what extent the construction of strategic gas storage could help Europe to reduce its vulnerability. The European market for imported gas is described by differentiated Cournot competition between Russia and other - potentially more reliable - suppliers, in particular LNG imports. The results show that Russian market power is limited, because demand is not completely inelastic even in the short run. Moreover, if Russia's unreliability increases (or if European short-run demand elasticity decreases) Russia gives away more and more of its expected profits to the other suppliers. For Europe, buying gas from more reliable suppliers at a price premium turns out to be more attractive than building storage capacity.

Abstract:
We study duopolistic pricing by ports that are congestible and that share a downstream, congestible transport network with other users in their respective hinterlands. In the central set-up, local (country) governments care about local welfare only and decide on the capacity of the port and of the hinterland network. We obtain the following results. First, profit-maximizing ports internalize hinterland congestion in as far as it affects their customers. Second, investment in port capacity reduces prices and congestion at both ports, but increases hinterland congestion in the region where the port investment is made. Investment in a port's hinterland likely leads to more port congestion and higher prices for port facility use, and to less congestion and a lower price at the competing port. Third, the induced increase in hinterland congestion is a substantial cost of port investment that strongly reduces the direct benefits of extra port activities. Fourth, imposing congestion tolls on the hinterland road network raises both port and hinterland capacity investments. We illustrate all results numerically and discuss policy implications.

port pricing, congestion, investment, cost benefit rules

Abstract:
This paper examines the rationale for the different tax treatment of gasoline and diesel cars currently observed in Europe. First, we analyse possible justifications for a different tax treatment: pure tax revenue considerations, externality considerations and constraints on the tax instruments used for cars and trucks. Next, an applied general equilibrium model is used to assess the welfare effects of revenue neutral changes in the vehicle and fuel taxes on diesel and gasoline cars. The model integrates the effects on tax revenue, environmental externalities, road congestion, accidents and income distribution.

Transport policies, transport externalities, optimal taxation, marginal tax, reform, gasoline and diesel, applied general equilibrium model

Abstract:
Europe’s dependence on Russian gas imports has been the subject of increasing political concern after gas conflicts between Russia and Ukraine in 2006 and 2009. This paper assesses the potential impact of Russian unreliability on the European gas market, and how it affects European gas import strategy. We also study to what extent Europe should invest in strategic gas storage capacity to mitigate the effects of possible Russian unreliability. The European gas import market is described by differentiated competition between Russia and a – more reliable – competitive fringe of other exporters. The results show that Russian contract volumes and prices decline significantly as a function of unreliability, so that not only Europe but also Russia suffers if Russia’s unreliability increases. For Europe, buying gas from more reliable suppliers at a price premium turns out to be generally more attractive than building strategic gas storage capacity.

gas, import, Europe, Russia, unreliability, competitive fringe, storage, contracts, differentiation

Abstract:
The paper is a general equilibrium analysis of an energy tax reform in a
federation. It gives us a tool to measure the welfare effects and the vertical tax externalities of the tax reform. Vertical tax externalities may arise when two government levels impose taxes on common tax bases. We show how the magnitude and sign of the vertical externality depend on the environmental goal, the tax-recycling scenario, the initial local and federal tax shares, and the size of the federation. Simulations illustrate the effects for a small European federation (e.g. Belgium) and a large federation (e.g. US).

Tax Reform, Vertical tax Externality, Federalism

Abstract:
In transportation planning there can be long lead times to adapt capacity. This paper addresses two questions. First, in a one mode world (say rail or road), what is the optimal capacity choice when faced with uncertain demand, long lead times and congestion. Using a simple analytical model it is shown that when demand is inelastic, it is socially optimal to invest more than if only the expected level of demand is taken into account. In this case it may be beneficial to over invest in capacity because congestion costs are a convex function of relative use. This result holds with or without optimal tolling. The second question deals with two competing modes and where only one mode has long lead times for capacity while the other has flexible capacity. This is typical for the competition between High Speed Rail and air for the medium distance trips (500 to 1000 km), or for the competition between inland waterways and trucks for freight. We find that over investment is less justified because the substitute mode can more easily absorb the high demand outcomes.

transport infrastructure, uncertainty, investments

Abstract:
This paper studies pricing and investment decisions on a congested transport corridor where the elements of the corridor are controlled by different governments. A corridor can be an interstate highway or railway line, or an inter-modal connection. We model the simplest corridor: two transport links in series, where each of the links is controlled by a different government. Each link is used by transit as well as by local traffic; both links are subject to congestion. We consider a two stage noncooperative game where both governments strategically set capacity in the first stage and play a pricing game in the second stage. Three pricing regimes are distinguished: (i) differentiated tolls between local and transit transport, (ii) one uniform toll on local and transit traffic, and (iii) only the local users can be tolled. Numerical analysis illustrates all theoretical insights. A number of interesting results are obtained. First, transit tolls on the network will be inefficiently high. If only local traffic can be tolled, however, the Nash equilibrium tolls are inefficiently low. Second, raising the toll on transit through a given country by one euro raises the toll on the whole trajectory by less than one euro. Third, higher capacity investment in a given region not only reduces optimal tolls in this region under all pricing regimes but it also increases the transit tolls on the other link of the corridor. Fourth, capacities in the different regions are strategic complements: when one country on the corridor increases transport capacity, it forces the other country to do the same. Fifth, we find interesting interactions between optimal capacities and the set of pricing instruments used: capacity with differentiated tolls is substantially higher than in the case of uniform tolls but overall welfare is lower. Finally, if transit is sufficiently important, it may be welfare improving not to allow any tolling at all, or to only allow the tolling of locals.

congestion pricing, transport investment, transit traffic

Abstract:
This paper deals with costs-benefit analysis of investment in transport infrastructure. Its contribution is twofold. Firstly, we develop a general equilibrium model to explore the impact of a small budgetary-neutral investment in transport infrastructure in a second-best setting, where other markets in the economy are distorted by taxes or external costs. The model incorporates different transport modes that are used both for intermediate inputs (freight) and for final consumption (passenger travel). An intuitive operational expression for the net economic benefit of an investment is derived that depends on the way the investment is financed. This expression generalizes recent findings in the literature. Secondly, we illustrate the results numerically using a small example. Our findings show that both the specific financing instrument used and the labour market consequences may have large implications for the net benefits of transport investments. Significant errors may be made in limiting cost-benefit analysis to transport markets only.

cost-benefit analyis, transport investments, marginal cost of funds

Abstract:
The purpose of this paper is to compare the interaction between pricing and capacity decisions on simple serial and parallel transport networks. When individual links of the network are operated by different regional or national authorities, toll and capacity competition is likely to result. Moreover, the problem is potentially complicated by the presence of both local and transit demand on each link of the network. We bring together and extend the recent literature on the topic and, using both theory and numerical simulation techniques, provide a careful comparison of toll and capacity interaction on serial and parallel network structures. First, we show that there is more tax exporting in serial transport corridors than on competing parallel road networks. Second, the inability to toll transit has quite dramatic negative welfare effects on parallel networks. On the contrary, in serial transport corridors it may actually be undesirable to allow the tolling of transit at all. Third, if the links are exclusively used by transit transport, toll and capacity decisions are independent in serial networks. This does not generally hold in the presence of local transport. Moreover, it contrasts with a parallel setting where regional authorities compete for transit; in that case, regional investment in capacity leads to lower Nash equilibrium tolls.

congestion pricing, transport investment, transit traffic

Abstract:
This paper presents a spatial model to study imperfect competition with congestion. The model is used to examine the price and wage setting of subcenters of a city. Residents live in a city while they shop and work in subcentres. Each subcenter offers one differentiated product and one differentiated workplace. Shopping and commuting from the city to the subcenter requires the use of transport infrastructure that can be congested.

We show the existence of a Nash equilibrium in prices and wages and analyse the welfare impacts of congestion charging and infrastructure policies. This paper generalised the literature on imperfect competition with differentiated products as well as the literature on congestion pricing with imperfect competition.

Road Pricing, Product Differentiation, Location Theory, New Economic Geography, Congestion

Abstract:
In this paper, we explore automobile fuel efficiency policies in the presence of two externalities i) a global environmental problem; and ii) international innovation spillovers. Using a simple model with two regions, we show that both a fuel tax and a tax on vehicles based on their fuel economy rating are needed to decentralize the first best. We also show that if policies are not coordinated between regions, the resulting gas taxes will be set too low and each region will use the tax on fuel rating, to reduce the damage caused by foreign drivers. If standards are used instead of taxes, we find that spillovers may alleviate free-riding. Under some conditions, a strict standard in one region may favour the adoption of a strict standard in the other one.

Environmental policy, automobile, fuel efficiency standard, gasoline tax, innovation spillovers

Abstract:
In this paper, we consider a region that invests in infrastructure used by both local demand and through transport. We then compare transport systems that have, for a given capacity, the same total infrastructure cost but vary in the proportion of fixed costs and variable capacity costs. We show, first, that infrastructure which has (ceteris paribus) a higher share of fixed costs leads to higher welfare for the regional government building it. Contrary to what is commonly believed, it therefore requires less, rather than more, federal subsidies. Second, we find that, even for capacity characterized by, ceteris paribus, very high shares of fixed costs, financing of infrastructure is generally not an important issue as long as regions are allowed to toll through traffic. Third, if member states cannot toll through traffic, or if a federal authority (such as the EU or the USA) can impose pricing at the global marginal social cost, our analysis shows that this reduces investment incentives for the individual regions, and subsidies may be needed. We discuss the policy implications of these findings and illustrate all theoretical results numerically.

capacity cost structure, cost recovery, transport investment

Abstract:
This paper looks at the optimal location of new forests in a suburban region under area constraints. The GIS-based methodology takes into account use benefits such as timber, hunting, carbon sequestration and recreation, non-use benefits (both bequest and existence values), opportunity costs of converting agricultural land, as well as planting and management costs of the new forest. The recreation benefits of new forest sites are estimated using function transfer techniques. We show that the net social benefit of the total afforestation project may vary up to a factor 6, depending on the forest sites that are selected. We show that the recreation value of a forest site varies considerably with the available substitutes.

Benefit transfer, travel cost analysis, cost-benefit analysis, forest recreation, Geographical Information Systems (GIS)

Abstract:
Externalities such as pollution and road congestion are jointly produced by the use of intermediate inputs by firms and the consumption of final goods by households. To cope with such externalities, policy proposals often suggest partial tax reforms. This paper uses a simple general equilibrium model to explore the effects of a reform of taxes on freight transport in a second-best setting. The theoretical model shows that the welfare effect of higher freight taxes is positive, unless passenger transport is severely under-taxed and the tax reform attracts substantially more passenger transport. Moreover, the optimal freight tax may be below or above marginal external cost. Budgetary neutral tax reform exercises with a numerical simulation model for the U.K. suggest that, under a wide variety of parameter values, higher freight transport taxes are indeed welfare increasing. The welfare gain of freight tax reform rises with the level of the passenger tax, but the optimal freight tax declines at higher taxes on passenger transport. Substantial net benefits of tax reform are obtained only under labor tax recycling of the revenues.

Abstract:
The purpose of this paper is to study the effects of tolling road use on a parallel road network where each link can be tolled by a different government. Using both theoretical and numerical models, the paper analyses the potential tax competition between countries that each maximise the surplus of local users plus tax revenues in controlling local and transit transport. Three types of tolling systems are considered: (i) toll discrimination between local traffic and transit, (ii) only uniform tolls on local and transit transport are acceptable, (iii)tolls on local users only. The results suggest that the welfare effects of introducing transit tolls are large, but that differentiation of tolls between local and transit transport as compared to uniform tolls does not yield large welfare differences. Also, the welfare effects of toll cooperation between countries are relatively small in comparison with the welfare gains of non-cooperative tolling of transit. The numerical model further illustrates the effects of different transit shares and explicitly considers the role of asymmetries between countries. Higher transit shares strongly raise the transit toll and slightly decrease local tolls. With asymmetric demands, the welfare gains of introducing differentiated tolling rise strongly for the country with lower local demand.

congestion pricing, transit traffic

Abstract:
In this paper we study how trip chaining affects the pricing and equilibrium number of firms. We use a monopolistic competition model where firms offer differentiated products as well as differentiated jobs to households who are all located at some distance from the firms. Trip chaining means that shopping and commuting can be combined in one trip. The symmetric equilibriums with and without the option of trip chaining are compared. We show analytically that introducing the trip chaining option can, in the short run, only decrease the profit margin of the firms and will increase welfare. The welfare gains are however smaller than the transport cost savings. In the long run, with free entry, the number of firms decreases but welfare with trip chaining possible is still higher than when it is excluded. A numerical illustration gives orders of magnitude of the different effects.

trip chaining, discrete choice model, general equilibrium model, imperfect competition, wage competition

Abstract:
According to Becker (1968) it is best to use very high fines and low inspection probabilities to deter traffic accidents because inspection is costly. This paper uses a political economy model to analyse the choice of the fine and the inspection probability. There are two lobby groups: the vulnerable road users and the 'strong' road users. If only vulnerable road users are effective in lobbying, we find that the expected fine is higher than if only the interests of car drivers are taken into account. When we consider the choice between inspection probability and the magnitude of the fine for a given expected fine, we find that the fine preferred by the vulnerable road users is higher than socially optimal. The reverse holds if only the car drivers are effective lobbyists. The orders of magnitude are illustrated numerically for speeding and contrasted with current fines for drunk driving in the European Union.

Political economy, enforcement, traffic safety

Abstract:
In this paper we study the problem of a city with access to two subcentres selling a differentiated product. The first subcentre has low free flow transport costs but is easily congested (near city centre, access by road). The second one has higher free flow transport costs but is less prone to congestion (ample public transport capacity, parking etc.). Both subcentres need to attract customers and employees by offering prices and wages that are sufficiently attractive to cover their fixed costs. In the absence of any government regulation, there will be an asymmetric duopoly game that can be solved for a Nash equilibrium in prices and wages offered by the two subcentres. This solution is typically characterised by excessive congestion for the nearby subcentre. We study the welfare effects of a number of stylised policies by setting up a general model and illustrating the model using competition between airports as an example.

The first stylised policy is to extend the congested road to subcentre 1. This policy will not necessarily lead to less congestion as more customers will be attracted by the lower transport costs. The second policy option is to add congestion pricing (or parking pricing (etc.) for the congested subcentre. This will decrease its profit margin and attract more customers. The third policy is acceptable for politicians: providing a direct subsidy to the remote subcentre, reducing its marginal costs. This policy will again ease the congestion problem for the nearby subcentre but will do this in a very costly way.

duopoly, imperfect competition, congestion, general equilibrium, airport competition

Abstract:
Given the difficulty of monitoring, and even more so of enforcing, International Environmental Agreements, it is surprising that they are signed and implemented. This paper offers a theoretical model, which addresses this issue. The focus is on informational and coordination problems. A country which is unsure about the benefits of environmental policy may find that the benefits are higher the greater the number of other countries which lean towards taking action. Whereas each country may individually take weak environmental action, in equilibrium several countries may take strong action if they expect others to. An International Environmental Agreement can thus be selfenforcing.
Such effects can appear even if international environmental spillovers are absent, and even if monitoring and enforcement are infeasible. Our approach can explain additional phenomena: why a country known to care little about the environment may deeply influence other countries if it takes strong environmental action, why lags may appear between the signing of an agreement and its implementation, and how requirements for approval by several bodies within a country can increase support for environmental action.

Environmental policy, international agreements, signaling, regulation

Abstract:
We consider a congestible road, where the cost of travel increases with the number of users on the road and decreases with capacity. Those persons who do not use the road favor a toll which would maximize revenue, and they oppose spending on road capacity. Users of the road prefer a low toll and a large capacity financed by general revenues. We describe conditions that make majority voting lead to a toll and capacity level that equals the socially optimal toll and capacity, that is smaller, or that is larger. This model can also explain the decrease over time of user fees for road use.

Abstract:
This paper offers the first formal economic analysis of carve-outs under airline antitrust im- munity. Carve-outs are designed to limit the potential anticompetitive effects of cooperation by alliance partners in hub-to-hub markets, where they provide overlapping nonstop service. While the paper shows that carve-outs are beneficial when the alliance does not involve full integration of the partners’ operations on the hub-to-hub route, its key point is that a carve-out may be harmful when imposed on a joint-venture alliance. A JV alliance involves full exploitation of economies of traffic density on the hub-to-hub route, and a carve-out prevents the realization of these benefits. While a carve-out may limit anticompetitive incentives on the hub-to-hub route, welfare may be reduced if the resulting gains are overshadowed by the efficiency loss generated by the carve-out.

carve-out, alliance, antitrust immunity, airlines

Abstract:
This paper offers a stylized model in which an agency is in charge of investing in road capacity and maintain it but cannot use the capital market so that the only sources of funds are the toll revenues. We call this the strict self-financing constraint in opposition to the traditional self financing constraint where implicitly 100% of the investment needs can be financed by loans. Two stylised problems are analysed: the one link problem and the problem of two parallel links with one link untolled. The numerical illustrations show the cost of the strict self-financing constraint as a function of the importance of the initial infrastructure stock, the rate of growth of demand, the price elasticity of demand and the flexibility in the pricing instruments.

Cost-benefit analysis, road tolling, self-financing, infrastructure investments, congestion, bottleneck model

Abstract:
Central governments often subsidize capital spending by local governments, instead of subsidizing operating expenses or labor-intensive projects. This paper offers one explanation, focusing on the incentive effects for local officials. A local official can more easily shift the cost of optimizing a project to his successor on a labor-intensive project than on a capital-intensive project.

federalism, capital subsidies, transit subsidies

Abstract:
We examine how diversification of projects assigned to an agency can enhance efficiency by informing a principal of the agency's quality. Projects that appear inefficient in isolation may be justified when assigned to the same agency. Assigning different tasks to different special purpose governments, though allowing for technical efficiency in the management of each project, may nevertheless reduce overall efficiency.

Special purpose governments, Asymmetric information, Bureaucracy, Project evaluation

Abstract:
In this paper, the problem of a city with access to two firms or facilities (shopping malls, airports, commercial districts) selling a differentiated product (shopping, flights) and/or offering a differentiated workplace is studied. Transport connections to one facility are congested. A model is presented for this asymmetric duopoly game that can be solved for a Nash equilibrium in prices and wages. A comparative statics analysis is used to illustrate the properties of the equilibrium. A numerical model is then applied to the two Brussels airports. Three stylized policies are implemented to address the congestion problem: expansion of transport capacity, congestion pricing, and a direct subsidy to the uncongested facility. Our results indicate that the degree of intrinsic differentiation between the two firms is crucial in determining the difference in profit and market share. Price and wage differences also depend on trip frequency and consumer preferences for diversity. Congestion pricing is the most effective policy tool but all three options are shown to have attractive attributes.