The paper investigates prices and the deadweight loss in multi-product monopoly (MPM) with linear demand and constant marginal costs. We examine MPM with three commonly used demand structures: standard heterogeneous products, vertically (quality) and horizontally (spatially) differentiated...

This paper investigates the pass-through of an excise tax imposed on a monopoly firm with constant marginal cost. The optimal price increases as tax increases for any demand function. Tax pass-through is globally under or in excess of 100% according as the direct demand function is log-concave...