entry_list {EconGeo}

Generate a data frame of entry events from multiple regions - industries matrices (same matrix composition for the different periods)

Description

This function generates a data frame of entry events from multiple regions - industries matrices (different matrix compositions are allowed). In this function, the maximum number of periods is limited to 20.

Usage

entry_list(...)

Arguments

...

Incidence matrices with regions in rows and industries in columns (period ... - optional)

Value

A data frame representing the entry events from multiple regions - industries matrices, with columns "region" (representing the region), "industry" (representing the industry), "entry" (representing the entry event), and "period" (representing the period)

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

growth_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 = 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[3, 1] <- 1

## run the function
entry_list(mat1, mat2)

## generate a third region - industry matrix in which cells represent the presence/absence
## of a RCA (period 3)
mat3 <- mat2
mat3[5, 2] <- 1

## run the function
entry_list(mat1, mat2, mat3)

## generate a fourth region - industry matrix in which cells represent the presence/absence
## of a RCA (period 4)
mat4 <- mat3
mat4[5, 4] <- 1

## run the function
entry_list(mat1, mat2, mat3, mat4)