EconGeo (version 2.0)

entry_list: 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(...)

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)

Arguments

...

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

Author

Pierre-Alexandre Balland
Wolf-Hendrik Uhlbach

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)