externalities appear along the lifecycle. In a simple model, we show that it may be efficient to subsidize innovative firms in their … early stages or to protect mature firms from competition to appropriate these externalities. However, non …-benevolent politicians may not choose efficient policies. Real-world examples indicate that politicians tend to concentrate on externalities …

-consistent policy rules that implement the stochastic first best as long as a future market exists. We apply our theory to carbon …

In this paper, we study regulation of externalities involving many small-scale polluters, where the damages from …

externalities via the interest rate. Conditional on differences in the processes determining household earnings for distinct groups … in the population, these savings externalities may contribute to inequality. Working with an open economy heterogenous … earnings processes of British households with university and non-university educated heads entail savings externalities that …

-best outcomes. We also show there exists a range of subsidy rates that are welfare-enhancing when greenhouse gas externalities are …

-tier (horizontal) and between-tiers (vertical and diagonal) fiscal externalities. Estimation of an unrestricted income tax reaction …

abatement. However, their effect on the carbon beta and risk premium of abatement can be decreasing (when innovation spillovers …

if intra-group negative externalities are sufficiently (but not too) strong with respect to positive inter …-group externalities …