Usage
concstats_sten(x, na.rm = TRUE)
Arguments
- x
A non-negative numeric vector.
- na.rm
A logical vector that indicates whether NA values should
be excluded or not. Must be either TRUE or FALSE. The default
is TRUE.
If set to FALSE the computation yields NA if NA values
are present.
Value
A single numeric measure in decimal form.
Details
concstats_sten calculates the Stenbacka index,
which indicates the market share of a dominant position.
References
Melnik, A., Shy, Oz, Stenbacka, R., (2008), "Assessing market
dominance", Journal of Economic Behavior and Organization,
68: pp. 63-72.
Examples
# a vector of market shares
x <- c(0.35, 0.4, 0.05, 0.1, 0.06, 0.04)
concstats_sten(x)
#> [1] 48.125
# a vector with NA values
x <- c(0.4, 0.2, 0.25, 0.1, 0.05, NA)
concstats_sten(x, na.rm = FALSE)
#> [1] NA
