Estudos de Economia, 1994, Volume XIV, nº 3
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- Spatial quality competitionPublication . Pontes, José PedroIn most industries, competition takes place among products which are simultaneously horizontally and vertically differentiated. The words «horizontal» and «vertical» have the usual meaning they take in the product differentiation literature. Launhardt (1885) determined equilibrium prices in the context of a duopoly where products are simultaneously differentiated in the horizontal and vertical senses. The model is a spatial one: horizontal differentiation is expressed by the relative locations of firms and consumers in the product space; vertical differentiation is expressed in a way that quality is the inverse of the transport rate with which the firm serves its customers. By introducing a finite reservation price, we believe to have achieved two results. First, the constraint imposed by the reservation price for distant customers bounds from above transport rates in the first-stage game, thus making useless the (arbitrary) assumption of an exogenous upper bound for transport rates. Second, in the case where firms have different locations, horizontal and vertical differentiation are shown to coexist in equilibrium. This corresponds to the purpose of the model, because it adds something new with relation to the models where horizontal and vertical differentiation are studied in isolation.
- A gestão dos recursos hídricos em PortugalPublication . Costa, José Silva; Silva, M. Manuela Castro
- Teoria dos grupos estratégicos : uma nova visão para as indústriasPublication . Curto, Dias
- Inflação no consumo : um indicador da política monetária?Publication . Andrade, João Sousa
- A história económica na história dos prémios Nobel da EconomiaPublication . Nunes, Ana Bela