entry.mat: Generate a matrix of entry events from two regions -...

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

Generate a matrix of entry events from two regions - industries matrices (same matrix composition from two different periods)

Description

This function generates a matrix of entry events from two regions - industries matrices (different matrix compositions are allowed)

Usage

entry.mat(mat1, mat2)

Arguments

mat1	An incidence matrix with regions in rows and industries in columns (period 1)
mat2	An incidence matrix with regions in rows and industries in columns (period 2)

Author(s)

Pierre-Alexandre Balland [e-mail]
Wolf-Hendrik Uhlbach [e-mail]

References

Boschma, R., Balland, P.A. and Kogler, D. (2015) Relatedness and Technological Change in Cities: The rise and fall of technological knowledge in U.S. metropolitan areas from 1981 to 2010, Industrial and Corporate Change 24 (1): 223-250

Boschma, R., Heimeriks, G. and Balland, P.A. (2014) Scientific Knowledge Dynamics and Relatedness in Bio-Tech Cities, Research Policy 43 (1): 107-114

See Also

exit, entry.list, exit.list

Examples

## generate a first region - industry matrix in which cells represent the presence/absence
## of a RCA (period 1)
set.seed(31)
mat1 <- matrix(sample(0:1,20,replace=T), ncol = 4)
rownames(mat1) <- c ("R1", "R2", "R3", "R4", "R5")
colnames(mat1) <- c ("I1", "I2", "I3", "I4")

## generate a second region - industry matrix in which cells represent the presence/absence
## of a RCA (period 2)
mat2 <- mat1
mat2[3,1] <- 1


## run the function
entry.mat (mat1, mat2)

PABalland/EconGeo documentation built on Jan. 5, 2023, 8:40 a.m.