Is there much variation in variation? Revisiting statistics of small area variation in health services research

Is there much variation in variation? Revisiting statistics of small area variation in health services research
B. Ibáñez, J. Librero, E. Bernal-Delgado, S. Peiró, B. González López-Valcárcel, N. Martínez, F. Aizpuru. BMC Health Services Research, 2009, 9 (60).   Fulltext   Abstract
Journal article