This paper studies technological change in renewable energies, providing empirical evidence on the determinants of innovative activity with a special emphasis on the role of knowledge spillovers. We investigate two major renewable energy technologies wind and solar across a panel of 21 OECD...

This paper introduces endogenous and directed technical change in a growth model with environmental constraints. A unique final good is produced by combining inputs from two sectors. One of these sectors uses "dirty" machines and thus creates environmental degradation. Research can be directed...

Optimal climate policy is studied in a Ramsey growth model. A developing economy weighs global warming less, hence is more likely to exhaust fossil fuel and exacerbate global warming. The optimal carbon tax is higher for a developed economy. We analyze the optimal time of transition from fossil...

Open-loop Nash extraction plans of exhaustible resource producers (in which producers take the plans of others as given) are time-consistent, but the normal specification of the open-loop import plans of countries with market power (in which countries take the import tariffs of other importers...

We investigate the Hartwick rule for saving of a nation necessary to sustain a constant level of private consumption for a small open economy with an exhaustible stock of natural resources. The amount by which a country saves and invests less than the marginal resource rents equals the expected...

The current price of a depletable resource depends on future demands and supplies, which affect how rapidly the resource is exhausted. Plans for future levels of demand and supply can therefore affect the current price. If agents have market power and can commit to future plans, then such plans...