If a small open economy wishes to restrict it's greenhouse gas emissions, it has to decide whether to impose uniform taxes on all polluters or to resort to a discriminatory policy. In practice, countries tend to impose higher taxes on households and to tax the industrial sector more leniently....

This study explores how energy tax influences energy R&D investments, which further affect economic welfare, carbon emissions, and climate change under various emission abatement policies. Energy tax, as a market-based instrument, aims to adjust the energy R&D investments to the optimal level....