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Stenbacka Index

Source: R/stenbacka.R
concstats_sten.Rd

The measure suggests an approach that classifies when an individual firm has a dominant position and therefore assesses market dominance.

Usage

concstats_sten(x, na.rm = TRUE, digits = NULL)

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 a message if the vector contains NA values. NAs will be removed for further computations.

digits

An optional value for digits. Specifies the minimum number of significant digits to be printed in values. The default is NULL and will use base R print option.

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.

See also

Other Competition/Concentration measures: concstats_all_comp(), concstats_comp(), concstats_dom(), concstats_hhi(), concstats_hhi_d(), concstats_hhi_min()

Examples

# a vector of market shares
x <- c(0.35, 0.4, 0.05, 0.1, 0.06, 0.04)
concstats_sten(x, digits = 2)
#> [1] 48.12

concstats_sten(x, digits = 3)
#> [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 = TRUE)
#> `x` has NA values. NAs have been removed for computation.
#> [1] 45.125