Hombrado Martos, Angustias María2024-05-202024-05-202011-11-231743-9434http://doi.org/10.1080/13597566.2011.578943https://hdl.handle.net/20.500.14468/11550Constitutional reforms affecting the asymmetrical allocation of powers between the constituent units of a federal or quasi-federal state have been generally studied as a bilateral relationship between the federal government and the region(s) asking for special treatment. In contrast, this paper examines the crucial role that non-specially empowered regions can play in these processes by raising anti-asymmetry reactions in the form of ‘catching-up’ and ‘blocking’ demands. A theoretical argument is developed concerning the causal mechanism linking several relevant conditions together (type of asymmetry, the distribution of national identities across regions, relative economic development and party politics) and lying between them and the alternative outcomes.eninfo:eu-repo/semantics/openAccessjournal articleasymmetrical federalismfederal constitutional changeregional demandscatching-up demandsblocking reactionsinterregional comparisons