[Resumo] Con especial atención á súa repercusión no ámbito local, abórdase a incidencia da reforma laboral levada a cabo a través do Real decreto lei 3/2012, do 10 de febreiro; da Lei 3/2012, do 6 de xullo, e do Real decreto 1483/2012, do 29 de outubro, no despedimento colectivo, distinguindo o sector público en sentido amplo das administracións públicas que, cun ámbito máis reducido, forman parte daquel. Saliéntase a definición diferenciada das causas económicas, técnicas e organizativas na Administración pública, en canto motivadoras e xustificadoras da decisión extintiva por parte dos empregadores. Estúdase tamén a perspectiva xurisprudencial, á vista das primeiras sentenzas ditadas nesta materia polos diferentes tribunais superiores de xustiza.[Abstract] With special attention to its impact at the local level, we address the incidence of the labour reform carried out through Royal Decree Law 3/2012, of February 10, of Law 3/2012, of July 6, and Royal Decree 1483/2012, of October 29, on collective dismissal, differentiating the Public Sector in the broad sense of the Public Administrations that, with a smaller scope, are part of it. We stand out the definition separated from the economic, technical and organizational reasons in the Public Administration, since they motivate the extinctive decision by employers. The case law perspective is also studied, in view of the first judgements dictated in this matter by the different Superior Courts of Justice