Resumen

LOPEZ-AYLLON, Sergio  y  VALLADARES, Florencio. Unconstitunality Actions in Mexican Constitution: Empirical Balance of Twelve Years of Exercise. Cuest. Const. [online]. 2009, n.21, pp.175-211. ISSN 1405-9193.

On December 31 2008, were met 13 years of one of the most important constitutional reforms to the justice system in Mexico, which introduced two new constitutional control mechanisms: the controversias constitucioniales and the acción de inconstitucionalidad. This article deviates from theoretical perspective and place an empirical assessment of this institution from a database of 301 actions settled by the Supreme Court between 1995 and 2007. The analysis shows that durtng the early years the acciones that were interposed were relatively few and mainly in electoral matters. With time the number of acciones has been increased significantly and also it has been diversified to its matter and impact, as a result of complex and more diverse constitutional conflicts.

Palabras llave : constitutional procedure; constitutional control; Supreme Court of Justice.