growth.mat: Generate a matrix of industrial growth in regions from two...

Description Usage Arguments Author(s) References See Also Examples

Description

This function generates a matrix of industrial growth in regions from two regions - industries matrices (same matrix composition from two different periods)

Usage

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growth.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 p.balland@uu.nl

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

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## generate a first region - industry matrix with full count (period 1)
set.seed(31)
mat1 <- matrix(sample(0:10,20,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 with full count (period 2)
mat2 <- mat1
mat2[3,1] <- 8


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

PABalland/EconGeo documentation built on Nov. 13, 2020, 2:50 a.m.