  The paper contains a short review of techniques examining regional wealth
inequalities based on recently published research work but is also presenting
unpublished features.
  The data pertains to Italy (IT), over the period 2007-2011: the number of
cities in regions, the number of inhabitants in cities and in regions, as well
as the aggregated tax income of the cities and of regions. Frequency-size plots
and cumulative distribution function plots, scatter plots and rank-size plots
are displayed. The rank-size rule of a few cases is discussed. Yearly data of
the aggregated tax income is transformed into a few indicators: the Gini,
Theil, and Herfindahl-Hirschman indices. Numerical results confirm that IT is
divided into very different regional realities. One region is selected for a
short discussion: Molise.
  A note on the "first digit Benford law" for testing data validity is
presented.
