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Demand for telephone lines and universal service in Spain

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1997
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Facultad de Ciencias Económicas y Empresariales. Instituto Complutense de Análisis Económico (ICAE)
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In this paper we use a model of demand for telephone lines to derive an econometric model of the net demand for new access lines in Spain, for the period 1980-1993, using quarterly observations. We use cointegration techniques to obtain long and short run equations, both estimated separately in two steps and jointly, The results show a strong sensitivy of the net demand for new lines to domestic usage price with an elasticity greater than one, an income elasticity also greater than one, and an elasticity with respect to price of access, in absolute value, less than one. We find that a tariff restructuring that lowers intemational and long distance rates while raises access rates might have a very small effect on the net demand for new lines. This suggests that the objective of universal service might be compatible with the kinds of tariff restructuring that have been recently considered in Spain.
Este trabajo hace una evaluación del coste del Servicio Telefónico Universal en España en la nueva situación de competencia. Para ello especificamos un modelo econométrico de la demanda neta de nuevas líneas telefónicas en España para el período 1980-93. Especificamos ecuaciones a corto y largo plazos, estimadas tanto de manera separada como conjuntamente. Los resultados sugieren una fuerte sensibilidad de la demanda neta de nuevas líneas al precio del uso nacional con una elasticidad mayor que la unidad; una elasticidad renta también mayor que la unidad y una elasticidad con respecto al precio del acceso menor que uno en valor absoluto. Partiendo de las estimaciones anteriores, ilustramos que una reestructuración de precios que rebaja las tarifas internacionales y de larga distancia al tiempo que eleva la cuota de abono puede tener un efecto muy pequeño sobre la demanda neta de nuevas líneas. Esto sugiere que el objetivo de servicio universal puede ser compatible con el tipo de reestructuraciones de tarifas que se han propuesto recientemente en España.
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