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La relevancia del sistema de I+D+I en las sociedades contemporaneas queda patente en el extenso repertorio de indicadores y series temporales elaboradas por instituciones estadisticas, organismos internacionales e investigadores de diferentes procedencias con el objeto de conocer su estructura y dinamica. Por ello, es preciso reflexionar detenidamente tanto sobre la naturaleza de los conceptos medidos como sobre los instrumentos y metodologias empleados para ello. En este trabajo se aborda la cuestion desde dos puntos de vista: el primero, de caracter conceptual, se refiere a la dificultad de medir conceptos intangibles; el segundo, evalua las consecuencias de adoptar una orientacion metodologica concreta para medir un fenomeno. The relevance of the R and D and innovation system in current societies is clear from the broad set of indicators and time series elaborated by statistic institutions, international organizations and other researchers, which have the purpose to know its structure and dynamics. Thus, we have to think carefully about the nature of these measures and the tools and methodology used to do it. In this work, we address two complementary questions: the first one is a conceptual dimension and refers to the difficulties of measuring intangible concepts; the second one assesses the consequences of adopting concrete methodological decisions to measure a phenomenon.

La dificultad de medición de los elementos intangibles del sistema de ciencia y tecnología