Tariff literature on third-degree price discrimination remains only lightly explored. The purpose of the paper is to investigate whether there exist optimum tariffs in the presence of different demand elasticities. We explore (i) the case of optimum uniform ad valorem tariff, and (ii) the case...

The role of steam coal was constrained by the Kyoto Protocol and the Copenhagen Climate Summit which call for reduced emissions of green house gases and related measures. These agreements increase the importance in properly managing emissions. Coupled with rapidly increasing demand from China...