conc
From ineq v0.2-13
by Achim Zeileis
Concentration Measures
computes the concentration within a vector according to the specified concentration measure
- Keywords
- univar
Usage
conc(x, parameter = NULL, type = c("Herfindahl", "Rosenbluth"), na.rm = TRUE)
Herfindahl(x, parameter = 1, na.rm = TRUE)
Rosenbluth(x, na.rm = TRUE)
Arguments
- x
- a vector containing non-negative elements
- parameter
- parameter of the concentration measure (if set to
NULL
the default parameter of the respective measure is used) - type
- character string giving the measure used to compute concentration. must be one of the strings in the default argument (the first character is sufficient). defaults to "Herfindahl".
- na.rm
- logical. Should missing values (
NA
s) be removed prior to computations? If set toFALSE
the computations yieldNA
.
Details
conc
is just a wrapper for the concentration measures of
Herfindahl
and Rosenbluth
(Hall / Tiedemann / Rosenbluth). If parameter is set to NULL
the default from the respective function is used.
Value
-
the value of the concentration measure
References
F A Cowell: Measurement of Inequality, 2000, in A B Atkinson / F Bourguignon (Eds): Handbook of Income Distribution, Amsterdam,
F A Cowell: Measuring Inequality, 1995 Prentice Hall/Harvester Wheatshef,
M Hall / N Tidemann: Measures of Concentration, 1967, JASA 62, 162-168.
See Also
Examples
# generate vector (of sales)
x <- c(541, 1463, 2445, 3438, 4437, 5401, 6392, 8304, 11904, 22261)
# compute Herfindahl coefficient with parameter 1
conc(x)
# compute coefficient of Hall/Tiedemann/Rosenbluth
conc(x, type="Rosenbluth")
Community examples
Looks like there are no examples yet.