conc(x, parameter = NULL, type = c("Herfindahl", "Rosenbluth"), na.rm = TRUE)
Herfindahl(x, parameter = 1, na.rm = TRUE)
Rosenbluth(x, na.rm = TRUE)
NULL
the default parameter of the respective measure is used)NA
s) be removed
prior to computations? If set to FALSE
the computations yield
NA
.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.
F A Cowell: Measuring Inequality, 1995 Prentice Hall/Harvester Wheatshef,
M Hall / N Tidemann: Measures of Concentration, 1967, JASA 62, 162-168.
ineq
, pov
# 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")
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