We study optimal subsidies for renewable energy (RE) generation to internalize external benefits from intertemporal learning-by-doing spillovers, taking into account increasing marginal costs at the industry level due to limited availability of sites suitable for RE. We find that the optimal RE...

In this paper, commuting is introduced to a federal economy where benevolent lower-level (state) governments levy an ad valorem tax on labour income. This results in inefficiently low levels of taxation, even when households as a whole do not migrate. Indeed, rather than attracting more workers...