Atkinson: A function to compute Atkinson segregation index
Description
The spatial version of Atkinson inequality index is based on
Lorenz curves. The user can decide wich part of the curve contributes more
to the index, by choosing the value of the shape parameter, delta.
Usage
Atkinson (x, delta = 0.5)
Value
a numeric vector containing the Atkinson's segregation index value for
each group
Arguments
x
- an object of class matrix (or which can be coerced to that class),
where each column represents the distribution of a group within
spatial units. The number of columns should be greater than 1 (at least 2
groups are required). You should not include a column with total
population, because this will be interpreted as a group.
delta
- an inequality aversion parameter
References
James, D. and K. E. Taeuber (1985) Measures
of Segregation. Sociological Methodology 15, pp. 1-32