diversity: Compute a simple measure of diversity of regions

In EconGeo: Computing Key Indicators of the Spatial Distribution of Economic Activities

Compute a simple measure of diversity of regions

Description

This function computes a simple measure of diversity of regions by counting the number of industries in which a region has a relative comparative advantage (location quotient > 1) from regions - industries (incidence) matrices

Usage

diversity(mat, rca = FALSE)

Arguments

mat	An incidence matrix with regions in rows and industries in columns
rca	Logical; should the index of relative comparative advantage (RCA - also refered to as location quotient) first be computed? Defaults to FALSE (a binary matrix - 0/1 - is expected as an input), but can be set to TRUE if the index of relative comparative advantage first needs to be computed

Value

A numeric vector representing the share of a tech in a city's portfolio

Author(s)

Pierre-Alexandre Balland [e-mail]

References

Balland, P.A. and Rigby, D. (2017) The Geography of Complex Knowledge, Economic Geography 93 (1): 1-23.

See Also

ubiquity, location_quotient

Examples

## generate a region - industry matrix with full count
set.seed(31)
mat <- matrix(sample(0:10, 20, replace = TRUE), ncol = 4)
rownames(mat) <- c("R1", "R2", "R3", "R4", "R5")
colnames(mat) <- c("I1", "I2", "I3", "I4")

## run the function
diversity(mat, rca = TRUE)

## generate a region - industry matrix in which cells represent the presence/absence of a RCA
set.seed(31)
mat <- matrix(sample(0:1, 20, replace = TRUE), ncol = 4)
rownames(mat) <- c("R1", "R2", "R3", "R4", "R5")
colnames(mat) <- c("I1", "I2", "I3", "I4")

## run the function
diversity(mat)

EconGeo documentation built on July 9, 2023, 6:58 p.m.