Although over the last thirty years an increasing number of scientific articles and books with diverse approaches have been published on the practice of constitutional adjudication, several methodological problems still prevail. The main deficiency of the systematic empirical research on constitutional adjudication consist in an unsophisticated dichotomous approach that separates the merely positive and negative decisions of constitutional courts, i.e. decisions that concluded in declaring the constitutionality or unconstitutionality of a given legislative act. This approach has been deeply inconsistent with the worldwide practice of constitutional adjudication, since the latter shows a widespread differentiation of judicial decisions over the last thirty years. In this study, we have elaborated a more sophisticated methodology for systematically mapping the manifold reality of constitutional adjudication, and measuring the strength of judicial decisions. In order to fit the research to reality, we have elaborated a scale to measure the strength of judicial decisions. This scale seems to be an appropriate tool to answer the main descriptive research question of our project: to what extent have decisions of constitutional courts constrained the legislative's room for maneuver? The present methodological paper focuses on the problem how to measure the strength of judicial decisions vis-à-vis the legislation and shows, by means of the first results of a pilot project, how this new methodology might be applied.

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