Optimum commodity taxation theory asks how to raise a given amount of tax revenue while minimizing distortions. We reexamine Ramsey’s inverse elasticity rule in presence of Hotelling-type non-renewable natural resources. Under standard assumptions borrowed from the...

A fundamental question in monopolistic competition theory is whether the market allocates resources efficiently. This paper generalizes the Spence-Dixit-Stiglitz framework to heterogeneous firms, addressing when the market provides optimal quantities, variety and productivity. Under constant...

This paper investigates the expenditure patterns of South African households using detailed cross-sectional expenditure and price data. Linear expenditure system (LES) parameter estimates are used to calculate income and price elasticities for a number of product categories at different points...