This paper develops an international oligopoly model in which domestic and foreign firms simultaneously choose their price and innovation strategies under the assumption of non-zero conjectural variations in relation to their competitors’ price changes. The model captures the links between the...

This paper develops a new methodology to compute social cost of living indices. These indices indicate whether or not price changes have a favourable (or unfavourable) impact on the welfare of the poor. The indices are derived on the basis of two alternative classes of social welfare functions....

This paper develops an international oligopoly model where foreign and domestic firms simultaneously choose their pricing strategies under the assumption of non-zero conjectural variations. The model captures the links between domestic and foreign producers’ prices and establishes a...

A framework for duality theory is set forth, based on the model-independent role of homotheties. An expansion vector field is introduced as global generator of pure expansion effects, in terms of which to deepen the differential aspects of preference symmetries, fundamental identities and...

The author establishes a property of supply for a competitive firm: Assuming differentiability of the production frontier, linearly independent price vectors have disjoint image sets under the supply mapping. This property supports the main results. First, the author drew a simple proof of...