| exit_mat {EconGeo} | R Documentation |
Generate a matrix of exit events from two regions - industries matrices (same matrix composition from two different periods)
Description
This function generates a matrix of exit events from two regions - industries matrices (different matrix compositions are allowed)
Usage
exit_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) |
Value
A matrix representing the exit events from two regions - industries matrices, with rows representing regions and columns representing industries
Author(s)
Pierre-Alexandre Balland p.balland@uu.nl
Wolf-Hendrik Uhlbach w.p.uhlbach@students.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
growth_list, exit_list, entry_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 = TRUE), 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[2, 1] <- 0
## run the function
exit_mat(mat1, mat2)