Consistent Conjectures in a Dynamic Model of Non-renewable Resource Management

We consider a dynamic model of non-renewable resource extraction under the assumption that players do not know their opponents' utility functions.[...]

Efficiency inducing taxation for polluting oligopolists: the irrelevance of privatization

This paper examines the optimal environmental policy in a mixed oligopoly when pollution accumulates over time. Specifically, we assume quantity competition between several private firms and one partially privatized firm. The optimal emission tax is shown to be independent of the weight the privatized firm puts on social welfare. The optimal tax rule, the accumulated stock of pollution, firms’ production paths and profit streams are identical irrespective of the public firm’s ownership status.

Efficiency inducing taxation for polluting oligopolists: the irrelevance of privatization

This paper examines the optimal environmental policy in a mixed oligopoly when pollution accumulates over time. Specifically, we assume quantity competition between several private firms and one partially privatized firm. The optimal emission tax is shown to be independent of the weight the privatized firm puts on social welfare. The optimal tax rule, the accumulated stock of pollution, firms' production paths and profit streams are identical irrespective of the public firm's ownership status.Mixed Oligopoly; Pollution Control; Markovian Taxation

Efficiency inducing taxation for polluting oligopolists: the irrelevance of privatization

This paper studies the optimal environmental policy in a mixed market when pollution accumulates over time. Specifically, we assume quantity competition between several private firms and one partially privatized firm. The optimal emission tax is shown to be independent of the weight the privatized firm puts on social welfare. The optimal tax rule, the accumulated stock of pollution, firms' production paths and profit streams are identical irrespective of the public firm's ownership status.Efficiency inducing taxation, Mixed duopoly, Privatization, Irrelevance

Information revelation through irrigation water pricing using volume reservations

We study the properties of a pricing rule for irrigation water with two variables:the volume consumed by the farmer and the volume he/she reserves before the plantation. With a simple deterministic model, we show how this pricing rule allows the Water User Association manager to anticipate any possible usage conflict thanks to farmer information revelation, to guarantee his/her association budget equilibrium. We show too how farmers are incited to restrain their use of water. Moreover this pricing method is fair (all farmers are equally treated), flexible through the possible change of the value of the parameters, and moreover simple and easily understandable (when for example translated in a double entry table). Therefore, it compares favorably to other classical water pricing methods.

How to use Rosen's normalised equilibrium to enforce a socially desirable Pareto efficient solution

We consider a situation, in which a regulator believes that constraining a complex good created jointly by competitive agents, is socially desirable. Individual levels of outputs that generate the constrained amount of the externality can be computed as a Pareto efficient solution of the agents' joint utility maximisation problem. However, generically, a Pareto efficient solution is not an equilibrium. We suggest the regulator calculates a Nash-Rosen coupled-constraint equilibrium (or a “generalised” Nash equilibrium) and uses the coupled-constraint Lagrange multiplier to formulate a threat, under which the agents will play a decoupled Nash game. An equilibrium of this game will possibly coincide with the Pareto efficient solution. We focus on situations when the constraints are saturated and examine, under which conditions a match between an equilibrium and a Pareto solution is possible. We illustrate our findings using a model for a coordination problem, in which firms' outputs depend on each other and where the output levels are important for the regulator.

Public Infrastructure, non Cooperative Investments and Endogenous Growth

This paper develops a two-country general equilibrium model with endogenous growth where governments behave strategically in the provision of productive infrastructure. The public capitals enter both national and foreign production as an external input, and they are …nanced by a at tax on income. In the private sector, fi…rms and households take the public policy as given when making their decisions. For arbitrary constant tax rates, the dynamic analysis reveals two important features. Firstly, under constant returns, the two countries growth rates differ during the transition but are identical on the balanced growth path. Secondly, due to the infrastructure externality, assuming away constant returns to scale a country with decreasing returns can experience sustained growth provided that the other grows at a positive constant rate. Then we endogeneize tax rates. It is shown that both a Markov Perfect Equilibrium (MPE) and a Centralized Solution (CS) exist, even when the parameters allow for endogenous growth, therefore explosive paths for the state variables. Nash growth rates are compared with the centralized rates. We show that cooperation in infrastructure provision does not necessarily lead to higher growth for each country. We also show that, in some con…gurations of households' preferences and initial conditions, cooperation would call for a slowdown in the initial stages of development, whereas strategic investments would not. Lastly, depending also on the con…guration of preferences, we show that cooperation can increase or decrease the gap between countries' growth rates.

Public infrastructure, non cooperative investments and endogeneous growth

This paper develops a two-country general equilibrium model with endogenous growth where governements behave strategically in the provision of productive infrastructure. The public capitals enter both national and foreign production as an external input, and they are financed by a flat tax on income. In the private sector, firms and households take the public policy as given when making their decisions. It is shown that both a Markov Perfect Equillibrium (MPE) and a Centralized Solution (CS) exist, even when the parameters allow for endogenous growth, therefore explosive paths for the state variables. And the dynamic analysis reveals three important features. Firstly, under constant returns, the two countries' growth rates differ during the transition but are identical on the balanced growth path. Secondly, due to the infrastructure externality, assuming away constant returns to scale a country with decreasing returns can experience sustained growth provided that the other grows at a positive constant rate. Thirdly, Nash growth rates are compared with the centralized rates. We show that cooperation in infrastructure provision does not necessarily lead to higher growth for each country. We also show that, in some configurations of households' preferences and initial conditions, cooperation would call for a recession in the initial stages of development, whereas strategic investments would not. Lastly, depending also on the configuration of preferences, we show that cooperation can increase or decrease the gap between countries' growth rates.

Short-run stick and long-run carrot policy: the role of initial conditions

This paper explores the dynamic properties of price-based policies in a model of competition between two jurisdictions. Jurisdictions invest over time in infrastructure to increase the quality of the environment, a global public good. They are identical in all respects but one: initial stocks of infrastructure. This is a dynamic type of heterogeneity that disappears in the long run. Therefore, at the steady state, usual intuitions from static settings apply: identical jurisdictions inefficiently under-invest, calling for public subsidies. In the short run, however, counterintuitive properties are established: i) the evolution of capital stocks can be non-monotonic, ii) one jurisdiction can be temporarily taxed, even though it should increase its investment, whereas the other is subsidized. It is shown how these phenomena are related to initial conditions and the kind of interactions between infrastructure capitals, complementarity or substitutability.