We present a continuous-time generalization of the seminal R&D model of d’Aspremont and Jacquemin ('American Economic Review', 1988) to examine the trade-off between the benefits of allowing firms to cooperate in R&D and the corresponding increased potential for product market collusion. We...

We analyze the optimal accumulation of renewable energy (backstop) generating capacity in a capital-energy economy with exhaustible fossil fuels. The analysis rests upon graphical illustrations of optimal control considerations. Due to the exhaustibility of fossil fuels the relative...

We incorporate three important aspects of current climate policy, unilateralism, demand side approach and a climate target, in a multi-country model with flow dependent fossil fuel extraction costs and a backstop. It turns out that the optimal climate coalition should encompass all countries...

Campbell (1980) and following authors have disussed a limited resoure extration capacity as an augmentation of the well-known Hotelling model. We integrate a limited extraction capacity and related investments in the endogenous growth model of Tsur & Zemel (2005) to study its effect on economic...

We study the incidence of carbon-reduction and green-energy promotion policies in a general equilibrium small open economy that depends on imports of fossil fuels. The focus is on mixed policies that are either price based (emissions taxes and producer price subsidies for green energy) or...

A small open economy operates a carbon emission trading scheme and subsidizes green energy. Taking cap-and-trade as given, we seek to explain the subsidy as the outcome of a trilateral tug of war between the "green" energy industry, the "black" energy industry and consumers. With parametric...

Under which conditions unilateral tightening of climate policy causes a weak or strong green paradox or even decreases social welfare has recently been studied by Hoel (2011). Hoel assumes that the costs of extracting fossil fuel are linear in output. We extend his model by allowing for...

This paper examines strategic incentives to subsidize green energy in a group of countries that operates an international carbon emissions trading scheme. Welfare-maximizing national governments have the option to discriminate against energy from fossil fuels by subsidizing green energy,...

The Green Paradox states that, in the absence of a tax on CO2 emissions, subsidizing a renewable backstop such as solar or wind energy brings forward the date at which fossil fuels become exhausted and consequently global warming is aggravated. We shed light on this issue by solving a model of...

A small open economy produces a consumer good along with green and black energy and imports fossil fuel for black-energy production at an uncertain world market price. Efficient risk management requires curbing fuel consumption, and hence carbon emissions, when consumers are prudent. Moreover,...