Time consistency problems can arise when environmental taxes are employedto encourage firms to take irreversible abatement decisions. Setting a high carbontax, for instance, would induce firms to invest in low-carbon technology,yet once investment has occurred the government can then reduce the...

Arguments about the appropriate discount rate often start by assuming a Utilitarian social welfare function with isoelastic utility, in which the consumption discount rate is a function of the (constant) elasticity of marginal utility along with the (much discussed) utility discount rate. In...