concstats is a small package that helps you to **calculate the
structure, concentration or diversity measures of a given
market.** You can reach that goal in different ways:

a) calculating an individual measure, e.g. the Herfindahl Hirschmann
Index (HHI) or its dual.

b) calculating a group of measures, e.g. structural measures, or

c) a selected set of measures in a one-step procedure.

To install the latest development version of `concstats`

directly from GitHub or use:

```
library(devtools)
::install_github("schneiderpy/concstats") devtools
```

Measures of concentration and competition are important and give a
first insight of a given market structure in a particular market.
**They are important to determine public policies and strategic
corporate decisions**. However, in research and in practice the
most commonly used measure is the Herfindahl Hirschman Index. The
`concstats`

package offers a set of alternative measures.

`concstats`

allows you to **calculate quickly a
particular measure or a group of measures to give you a better overview
of a given market situation and therefore reducing uncertainty.**
**It can be used by practitioners and academics
alike.**

`concstats`

should be used by practitioners and academics
**who are concerned about a given market situation regarding its
structure, concentration, diversity or inequality**. **A
single standard measure like the Herfindahl Hirschmann Index (HHI) may
lead to erroneous conclusions.** The `concstats`

package offers a **straightforward way to calculate standard and
alternative measures** given a data set of market participants
and their participation (in absolute or relative values) in a particular
market at a given point of time or over time. concstats provides
currently the following basic functions:

**concstats**calculates eight pre-selected measures in a one-step procedure to provide a first insight of the market.**mstruct**is a wrapper for the following measures:**firm**,**nrs_eq**(Numbers equivalent),**top**,**top 3**and**top 5**market share, and**all**calculates all measures as a group.**comp**is a group wrapper for the following concentration measures:**hhi**, the**dual of the hhi**, the**min. of the hhi**, the**dominance index**, the**stenbacka index**, and finally**all**which calculates all measures as a group.**inequ**is a wrapper for inequality and diversity measures and contains:**entropy**,**gini coefficient**,**simpson index**, the**palma ratio**and the alternative**grs**measure,**all**calculates the group measures.